SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOLUME
101.NUMBER
3ENVIRONMENT AND NATIVE SUBSISTENCE ECONOMIES IN THE CENTRAL
GREAT PLAINS
(With
Five Plates)BY WALDO
R.WEDEL
AssistantCurator, Division ofArcheology U.S.NationalMuseum
(Publication 3639)
CITY
OF WASHINGTON
PUBLISHED
BY THE SMITHSONIAN
INSTITUTIONAUGUST
20, 1941SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOLUME
101,NUMBER
3ENVIRONMENT AND NATIVE SUBSISTENCE ECONOMIES IN THE CENTRAL
GREAT PLAINS
(With
Five Plates)BY WALDO
R.WEDEL
Assistant Curator, Division ofArcheology U.S.National Museum
(Publication 3639)
CITY OF
WASHINGTON
PUBLISHED
BY THE SMITHSONIAN
INSTITUTIONAUGUST
20, 1941BALTIUORE, MD., U.S. A.
ENVIRONMENT AND NATIVE SUBSISTENCE ECONOMIES IN THE CENTRAL
GREAT PLAINS
By WALDO
R.WEDEL
AssistantCurator, DivisionofArcheology, U.S.National
Museum (With
FivePlates)During
the past lOyearsan increasing interest hasbeen manifested in the relations ofman
to environment in the Great Plains.Wide-
spread droughts, spectacular dust storms,and
recurrent crop failures are drivinghome
againa factwhich had
beenlargelyforgotten during the preceding prosperous decades—
namely, that the climatic fluctua- tions towhich
the region is subject can be of sufficient magnitude to render man's occupation precarious.Numerous
farms have been abandoned,and
thereisa rather generalbelief thatmuch
of thelandiswholly unsuited to agriculture. Students of ecology
and
geography, recallingsimilarhappenings inthe past, have beeninsistingagain that a long-rangeprogram
of land utilization in place of the present hap- hazardmethods would make
possible the recovery ofmuch
of the supposedlyworthless area.It is not
my
intention here to suggest a cure for the economic problemsarisingfrom
the conditionsjustnoted,butrather toexamine
certain pertinent facts brought out
by
recent archeological investiga- tions.We know now
that long before white explorers ventured into the Great Plains, the regionhad
been exploited in differentways by
various native peoples.There
is agrowing
belief thatsome
of these aboriginal groupsmay
havehad
to cope with adverse climatic condi- tions similar to those facedby man
here today.The
evidence is stillfragmentary
and
scattered, because the area involvedisenormous and
the workers are few. Still, itmay
beworth
while to indicate the directions inwhich
theavailabledataappear to lead.For
present purposes the central Great Plains comprise the area included in the States ofKansas and
Nebraska.We
shall review brieflytheenvironmentalsetting asabackground
foran
outline of the historicand
prehistoric native subsistence economies. This will beSmithsonian MiscellaneousCollections, Vol. 101, No.3
2
SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. lOI followedby
a consideration of the possible significance of certain inferred climatic variationsupon
pasthuman
populations/ENVIRONMENTAL FACTORS
To
thecasualobservertraveling acrossNebraska and Kansas
along themain
thoroughfares, the region exhibits a ratherwearisome
uni- formity. In broadest outlineit is a land oflow
relief,few
trees,and
little rainfall
—
of sunand wind and
grass.A
closer regard for thedetails of topography, native flora
and
fauna,and
other aspects of the environment will show, however, that there are anumber
of natural variations (see Shelford, 1926,and Fenneman,
1928)which
bear on man'sutilizationof the land.The
western portion of the area is a part of theHigh
Plains prov- ince (fig. i)—
theremnant
ofagreatoutwash
plainwhich
in Tertiary times reachedfrom
themountains
intoeasternNebraska and
Kansas.The High
Plains are characterizedby
broad,monotonously
flat upland areaswhich,toward
the north,tendtobecome uneven
or gentlyrolling.Rivers heading in the
Rocky
Mountains, such as theArkansas and
Platte, flow eastward across this belt in wide, flat-floored valleys.
Lesser streams rising within the
High
Plains occupy shallow,open
valleys
which
in places giveway
to picturesque rock-walled canyons.Where
the secondary valleys have been cut through the unconsoli- dated Tertiary silts, sands,and
gravels intothe impervious underlying formationspermanent
springs occur.These
give rise to perennial creeks flowing in verdant valleyswhich
contrast strikingly with the surrounding uplandsand
which, since time immemorial, have pro- vided idealcamp and
village locations for primitiveman
(pi. 3).Where
notunder
cultivation, the uplands aredominated
by buffaloand grama
grasses, with yucca, cactus,and
sagebrush locally abun- dant. In the valleys there are groves of hackberry, cottonwood,and
willow, withsome
elmand
ash. Thickets of wild plum, elderberry,and
other edible native plants are scattered along the ravinesand
stream valleys. Junipergrows
alongthe valley rims,and
in parts ofNebraska
there are stands of western yellow pine. Native fauna included notably such animals as the bison, antelope,mule
deer,^For helpful information and stimulating suggestions as this study developed,
I
am
particularly indebted to Dr. C. E. Leighty, J. S. Cole, andO. R. Mathews, agronomistsat theDivisionof Dry LandAgriculture, Bureauof PlantIndustry, U. S. Department of Agriculture; and to Harry E. Weakly, junior agronomist at the North Platte Experimental Substation of the College of Agriculture, Universityof Nebraska.NO. 3
CENTRAL GREAT PLAINS WEDEL
Fig. I.
— Map
of the central Great Plains and upper Missouri Valley, show- ing physiographic divisions, tribal groups, and archeological sites considered in the present paper.4 SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. lOIprairie dog, coyote, black-footed ferret, jack rabbit, badger,
and
smaller forms,and game
birds such as prairiechickenand
grouse.East of the
High
Plains there is amarked
change in the terrain.North
of the Platte River inNebraska
are the Sandhills, a rough,hilly area dotted with ponds, lakes, marshes,
and hay
flats.The
hills arein realitysand duneswhich
are held fastby
a cover ofbunchgrass interspersed with yuccaand
cactus. Trees are scarce except in the vicinity of ranch buildings.There
arefew
streams, but thosewhich
head inthe region, notably the several forksand
upper tributaries of theLoup,
carryan abundance
of excellent water throughout the year.They
head, in shallow, grassy swaleswhich
soon giveway
to deep canyonslined with deciduoustimber,plum
thickets,and
other vegeta- tion.*Wild
ricegrew
insome
of theshallow lakesand was an
impor- tant native food item (Gilmore, 1919, p. 67). Beaver, muskrat, deer,and
smallermammals
inhabit the valleys; coyotesand
jack rabbitsabound
;and
greatnumbers
of waterfowl still have their nestinggrounds
about the lake margins. Like theHigh
Plains, the Sandhills are a region of low rainfall. Since the soil is looseand
sandyand
tends toblow
readilywhen
the sod is removed, large-scale agricultureis impracticable
and
cattle raising is the principal activity today.South
of theRepublican River,innorth-central Kansas, theeastern front of theHigh
Plains has been dissectedby
stream erosion to produce the so-called Plains Border. This is a belt of high plateausand
prominenteast-facingescarpmentscutthroughby
the deep,broad valleys of theSmoky
Hill, Saline,Solomon, and
their tributaries.Buttes
and
ridges are a conspicuous feature of the landscape.The
fertileriver valleys are fringed with forests of oak, elm, ash, walnut, Cottonwood,
and
other hardwoods,and
bluestemand
bunchgrasses formerlyclothed the uplandareas. Nativefauna includedall the largerforms found
onthe Pligh Plains togetherwithnumerous
other speciesmore
typicalof areastotheeast.^In 1895 Bessey (1896) observedthatrelict standsofwestern yellowpinewere tobe found inthecanyons alongthe NiobraraRiveras far east asHolt County, along the North Platte and Lodgepole Rivers to Lincoln County, in widely isolated canyons in Valley, Custer, Greeley, and other Counties in central Nebraska, and alongthe Republicanto the vicinity of Franklin. Theselocalities lie for the most part west of the 99th meridian. Hussong (1896) also calls attention to the fact that "yellow pine grew formerly inand along the canyons south of the Republican River in Franklin County ..." Early settlers cut the largertrees for fuelandposts, andtransplantedthe smallerones togardens and lawns. Bessey held that these distributions were best explained "by supposing thatthe central regionwas once whollyorinpart covered withforests."
NO. 3
CENTRAL GREAT PLAINS — WEDEL
5 East of the Sandhillsand
PlainsBorder
provinces the Great Plains giveway
towhat was
formerly a bluestemand
prairie-grass region.In eastern
Nebraska
the Loess Plains present a flat to rolling orhilly terrain.A
thick mantle of loess extendsfrom
the Missouri Valleywestward
to the Sandhills and,asa narrower band, betweenthe Platteand
Republican Valleysto theHigh
Plains in southwesternNebraska
(pi. 4, fig. i).
To
the southeast itmerges
into the unglaciated gently rollingOsage
Plains lying south ofKansas
River.Throughout
all this region, the streams run in broad, bluff -lined, often terraced, val- leys. Fine stands of burr oak, elm, walnut, hickory, sycamore,and
otherhardwoods
skirt the streams. Edible plants include the wild grape, plum, chokecherry, mulberry,and
anumber
of tuber-bearingforms
(see Gilmore, 1919).Other
itemswhich
unquestionably figured in aboriginaleconomy were
theOsage
orange or bois d'arc,papaw,
pecan,and persimmon,
allfound
in easternand
southeastern Kansas. Bison, elk, antelope,and
deerfound
unlimited•pasturage in the valleysand on
the deeply grassed uplands. Wolves, coyotes, badgers,and
rabbitswere
plentiful; along the streamswere
beaver, bear, otter, raccoon, cougar, opossum, wildcat, fox squirrels,and
a host of lesser forms.Most
of these followed thewooded
valleyswestward
far into the plains.Permanent
streams are, or were, the rule,and
fine springs formerlyabounded on
the larger as well as onmany
of thelesserwatercourses. Precipitation, except in thewest, isample
for agricultural needs,and
the soils everywhere are deep, rich,and
easily worked.Today
this is themost
densely populatedand
the finestagriculturallandin the central GreatPlains.The
Loess Plains are flankedby
anarrow
strip ofrugged
hillson
the eastwhere
short, deeply incised creeksand
narrow, heavily timbered ravinesempty
directly into the Missouri River. Broadleaf forests and dense thicketswere
formerly dominant,and
the districtabounded
withgame and
other wild-food resources. Historical ac- counts indicate that the lofty bluffs frontingon
the Missouriwere
bare oftrees during the early nineteenth century, butthe valleysmust
always have been wellwooded.
From
thestandpoint of agriculture, whethermodern
or aboriginal, probably themost
important factor in utiHzation of the Great Plains byman
isclimate (Kincer, 1923,and
Climaticsummary
of the United States, sections 38-41).The
region as awhole
is characterizedby
warm summers
withabundant
sunshine;by
winters thatare coldand
dry;and by
considerable windiness throughout the year. In the central portion, aswe
have defined it, there is a frost-freegrowing
6 SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. lOIseasonof 150-200days, sufficientto
mature most
cerealsand
vegetable crops. Precipitationdecreasesmarkedly from
an annualtotal of about40
inchesinsoutheasternKansas
to 15 or 18 inchesin westernKansas and
Nebraska. Because of thedrywinters, the moisture stored in the soil is generally scanty; hence cropsdepend
chieflyon
the rainfall duringthegrowing
season. In thisrespect, theaverageannual precipi- tationshows
a favorable distribution, since about70
percent ormore
fallsbetween April
and
September.As Smith
(1925, p. 413) has pointed out, "averages do not tell thewhole
story.Averages
rarelyhappen.The
freaks of theseasondecide man's chances . . ." In the Great Plains, theminimum
precipitation required for successful agriculture by ordinarymethods
issomewhere
between 15and 20
inches annually. Thismeans
thatovermuch
of the region, particularly west of the 98th or 99th meridian, the yearly average is very close to theminimum
required for successful crop growth,and
hence that the year to year variation is of very great importance.A
decrease in rainfall of only afew
inches, particularly if continued for several years,may
result in amajor
disaster for the grain farmer.^ Furthermore, long-time M^eather recordsshow
that in the western Great Plains "there is less than thenormal amount
of rainfall inmore
than half the years."Farming
exceptby
specializedmethods
isrenderedstillmore
precariousby thefactthat theremay
be several seasons of deficient moisture.These
fluctuations are of vari- able duration, do notcome
in regular succession,and
cannot be fore- castwithany
accuracy.The
character of thesummer
rainsmust
also be considered. In large part, theycome
as thunderstorms, often of great violenceand
short duration.Downpours
of 3 to6
inches within a 24-hour periodhave
been recorded atmany
points, this sometimes exceeding inamount
thenormal
precipitation for themonth
inwhich
it occurs.The
rainsmay come
with such force that theground
surface ispuddled, so that
most
of the water runs ofif before it can be absorbed^The delicate balancebetween yearly rainfall and crop yields in this western area has been strikinglydemonstrated by Cole (1938).
From
weatherand crop records for 14 stationsinwesternNebraska,Wyoming, North and SouthDakota, and Montana, he has determined the mean precipitation and mean averageyield of spring wheat over periods varying in length from 10 to 28 years. With an averageprecipitation of justunder 15 inches,theaveragewheatyieldwasslightly over 15bushels peracre.When
averageprecipitationfell20 percentto 12inches, wheat yield dropped nearly 50 percent to a trifle over 8 bushels.A
further loweringof precipitation to 50 percentofnormal thus resultednotina halfcrop but inno cropatall.No
comparable statisticsare available on rainfall andcorn growthinthis region, but asimilarcorrelationmay
be suspected.NO. 3
CENTRAL GREAT PLAINS WEDEL
7 by the soil.These
storms, furthermore, are mostly local, with short, erratic courses thatmay
leave one small area drenched while sur- rounding sections receive little orno
moisture. Similar local dif- ferences are reflected in the annual precipitation recordsfrom
time to time. Thus, in 1S75and
again in 1901-3 inclusive atDodge
City, Kans., annual precipitationwas from
50 to90
percent ofnormal
(average, 19.9 inches) ; but during thesame
years at Hays, 85 miles tothe north, therewas
an excess of moisturerangingfrom
5 to nearly 50 percent (average, 21.28 inches).Droughty
conditions insummer
are often attendedby
prolonged periods of high temperatures. Southerlywinds
predominate; beingwarm,
they havea drying effect,and
their high velocity favors rapid evaporation. Particularly destructive are the so-called "hot winds"which may accompany
shade temperatures of 100° to 110°.They
have been likened to a blastfrom
a hot furnace,and
frequently causemuch damage
to cropsandserious discomforttoanimallife.Immense
havocmay
bewrought
in afew
hours if thesewinds
occur at critical stages of crop development,and when
they continue for several daysman and
beast alike suffer intenselyand
widespread crop failures result.Many
farmers insist that these hotwinds
can kill the corn crop evenwhen
through subirrigation or otherwise the soil is moistenough
tomeet
thenormal
requirements of thegrowing
plants. Iam
not certain, however, that this view has general acceptance
among
impartial observers.
HISTORIC SUBSISTENCE ECONOMIES
The
99thmeridian, lyingsomewhat
east of thelineof 20-inchannual precipitation,may
be regarded as the approximate dividing line be- tween the Great Plains on the westand
the true prairies or prairie plainsontheeast. Itwillservealsoas thelineofdemarkationbetween two
strikingly divergent native subsistence economies in the central Great Plains during the nineteenth century.To
the east,where
soiland
especiallyclimatic conditions are today recognized asmost
favor- able for farming, the nativeeconomy was
based on horticulture with hunting secondary.West
of this line,where
bitter experience has sinceshown
the white settler that agriculture is likely to be a highly uncertain venture, huntingwas
ofprimaryimportance.The
principal naturalgame
resources of theHigh
Plains have already beennoted.What
theymay
have lacked in varietywas more
thanoffset
by
theabundance
ofcertain species.During
the nineteenth century theHigh
Plainsand
the PlainsBorder
immediately to the8 SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL.Id
east
were
preeminently the rangeof the great bison herds. Parasiticon
thesewere
several Siouan, Algonquian,and Shoshonean
Indian tribeswhom we may term
themigratorybisonhunters (fig. i).North
of the Plattewere
theDakota
bands; farthersouthwas
the habitatof the Cheyenne,Arapaho, Comanche, and Kiowa. Throughout
the spring,summer, and
early fall organizedbands of these Indianshung
about the flanks of the herds, subsisting chieflyon
the flesh of the bisonand
drying large quantities ofmeat
for winter use. In winter the roving village units usually returned to certain sheltered spotswhich
because of water,wood, and
forage forhorseswere
used year after year.Large
herdsofhorseswere
tobe seenateverycamp.The
portable skin tipi
was
universally used (pi. i). Skinworking was
highly developed; otherwise, implements, utensils,and
industrieswere
limited toessentialswhich
couldbemoved
easilyand
convenientlyon
horsebackfrom camp
to camp. Surplus foodswere
storedin skin containers. Agriculturewas
nonexistent, aswas
the potter'sart.The
gatheringof quantities of wild fruits, nuts, berries,and
starchy rootsand
tuberssupplemented thechase (Carlsonand
Jones, 1940); maizewas
obtainedby
trade or theftfrom
settled horticultural tribes.An
elaborate militaristic system
had
been built up,and much
of the time not occupied in food gettingwas
given over to warfareand
horse stealing.These
peoples recognized no definite tribal boundaries,and
the distances traveledby them
during their annual hunting tripsand
inraiding forays frequently totaled
many hundreds
of miles.East of the 99th meridian, since the
coming
of the whiteman,
have dwelt chiefly Siouan-and
Caddoan-speaking tribes. EasternKansas was
heldby
the Osage, northeasternKansas by
the Kansa, easternNebraska by
the Oto, Missouri,Omaha, and
Ponca. Farther to the west,on
theLoup,
Platte,and
Republican Rivers, stood the villages of thePawnee,
a confederacyofCaddoan
tribeswhose
nearestkindred linguisticallywere
theArikara inSouth
Dakota.At
thedawn
of the contact period, the Wichitaare believedto havehad
agroup
of settle-ments
in centralKansas
in the vicinity of the greatbend
of the Arkansas.These were abandoned
during the eighteenth century for other lands farther south.The
restof thetribesenumerated
remained intheirrespective locationsuntil reservationdays acenturyor solater.All these tribes dwelt in large fixed villages situated near streams
where wood, permanent
water,and
arableground were
to be had.Habitations
were
circular earth-covered or grass-thatched lodges (pi. 2). Subsistencewas
based primarilyon
the cultivation of maize, beans,and
squash, towhich were added
a long list of wild berries,NO. 3
CENTRAL GREAT PLAINS
VVEDEL9
fruits,
and
tubers (Gilmore, 1913,and
1919).The
latter included wildplum,hackberry, chokecherry, sandcherry,wild potato{Ipomoea
pandurata),ground
bean {Apios titberosa), thepomme
blanche (Psoralca csciilcnta),and
others.Of
considerable importance, too, especiallyafter acquisition of the horse about 1700,were
theproducts of the chase. Bisonwere
the principalgame
animal,and
to obtainthem
one ortwo
well-organized hunting tripswere made
annually into the western plains.The Omaha and Ponca
hunted north of the Platte into the Sandhills; thePawnee went
eitherup
the Platteand
Republican Valleys, or else shared with theKansa and Osages
the PlainsBorder and
adjacent regions in central Kansas.At
such times the entire population of the villages excepting the very young, the senile,and
the decrepitmoved
en masse, dwelling in portable skin tipisand
hauling their-impedimentaon
horseback orby
travois,and
living in generallike themigratory bison hunters.
At
thetemporarily deserted villages, the possessionswhich
could not be carried alongwere
concealed inunderground
pits.Under
aboriginal conditions all these groupsmade
pottery,and
possessed in addition well-developed industries in stone, bone, horn, shell,and
other materials.Whereas
the
temporary
campsites of the migratory bison hunters todayshow
little evidence of occupancy
beyond
hearth areasand
possibly afew
stone implementsand
animal bones, theabandoned
house sites, cachepits,
and
accumulated refuse deposits of the village dwellers usually yieldarichharvest for the archeologist.Fundamentally, the native agriculture of the Great Plains
was
of southeastern type,with tillagemostly orentirely by the hoe.The
old type of hoe consisting of a bison shoulder blade lashed to a bent or forkedsticksurviveduntilverylate times,beingusedsidebysidewith iron tools suppliedby
the traders.The
fields— more
accurately de- scribed asgardens— were
small, rangingin sizefrom
:!:to 3 or4
acres.No
attemptwas made
to break out the tough sod of the uplands. In the valley bottoms, the plantingswere
confined to little patches of loose alluvialsoilscattered alongthe creekbanksor lyingatthemouth
of a ravine. Because such spots
were
usually limited innumber,
thewomen
oftenfound
it necessary to travelfrom
5 to 10 miles toand from
theirgardens. Corn, beans,and
squashwere
the principal crops, but sunflowers, tobacco,and
watermelonswere
alsogrown
(Gilmore, 1913,p. 322).Women
didallthe plantingand
cultivating. Fertilizerswere unknown and
there isno
evidence that irrigationwas
attempted.It is not definitely
known whether
the Indians of the central Great Plainshad
developed special deep-rooted, early-maturing, or drought-lO
SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL.Id
resistant varieties of corn, as
had
theMandans
of the upper Missouri(cf. Will, 1922), but it is quite possible that in the course of years
some
selectionofthis sorthad
takenplace.The
fieldswere
ordinarilyhoed
onlyonceortwice. Afterthesecond hoeing, in June, the entire population of the village set out on thesummer
hunt, returning inSeptember
to harvest the crops. Surplus cornwas
boiled, cutfrom
the cob,and
dried,and
then stored inunderground
caches.These
caches,when
emptied of foodstutfs orwhen
rendered unfit for further useby
spoilage of their contents,were
abandoned, often to be refilled with refuse.Such
pits are acommon
feature of every village site so far excavated in the central Great Plainswhere
horticulture is evidenced. In the early historic villages of thePawnee
along theLoup and
at thecontemporary
Wichita (?) sites in central Kansas, these caches are often 6 feet deep,and
they have beenknown
to attain a depthand
a diameter of 10 feet oreven more.At
later sites, particularlyin those dating after 1800, caches seldomreach thesedimensions. Itisnot yetclearwhether this decreasein size reflects smallercrops due to a slackening interest in farmingand
a correspondingly greater reliance on hunting or is attributable tosome
other factor.The Pawnee and Omaha
used an uprightwooden
mortar with pestle for grinding corn;their protohistoric contemporaries in centralKansas
usedtheflat orhollowed stone mealingslab with muller.ARCHEOLOGICAL CONSIDERATIONS
As
systematic archeology adds perspective to our picture of native life in the central Great Plains, itbecomes
increasingly clear that thetwo
fundamental economicpatterns outlinedabove, or variants thereof, have long been present locally, but that man's emphasis has shifted l)ackand
forthfrom
one tothe other.As Kroeber
(1939, pp. 76-79) hasindicated, ". . . thehistoricPlains [horse] culturewas
alatehigh- pressure center of culture in a regionwhich
previouslyhad
been rather conspicuously low-pressure."He
is undoubtedly correct, too,when
he observes further that in the prehistoric period, prior to the sixteenth century, the plainswere
a cultural margin.By
comparison with the easternWoodlands and
the Southeast,where advanced
mound-building civilizations once flourished, the region west of the Missouri is characterizedby
antiquities of quite unspectacular nature.Temple mounds,
for example, are nonexistent;and
the practice of raising tumuli over the dead,which
serves to emphasize the highly elaborated burial cults of the east, extends only a littleway
into theNO. 3
CENTRAL GREAT PLAINS WEDEL
IIprairie plains of eastern
Kansas and Nebraska and
is not indicated atall for theplainsproper.The
admittedlymarginalnature of thesemisedentaryvillagecultures in historic times, together with thenomadic mode
of life followedby
the "typical" plains tribes farther west, has tended to obscure certain facts relating to the earlier agrarian peoples in the area.Kroeber
(op, cit.) states that "It is scarcely contendable that the westernplainswere
wholly uninhabitedbefore thehorsewas
available.Agricultural groups
from
eastand
west probably strayed innow and
thenand
tried to farm. Small groups couldmake
a livingby com-
bining bisonand
river bottom hunting with berryand
root-gather- ing..."
Archeologyshows
that primitive maize growersfrom
the easthad
indeed penetrated farbeyond
the westernmargin
of the prairie plainsand had
established themselves alongmany
of the stream valleys in theHigh
Plains. Their settlementswere much
smaller
— and
farmore numerous —
than those of such historic village tribes as thePawnee.
It is hardly accurate to speak of these pre- historic groups asmere
"strays," for theycame and
spread in suf- ficiently leisurely fashion to scatter their remains along almost every arable stream valley with reasonably sure water as far west as the Colorado line.The
diffuse nature of this early occupancy is in striking contrast to that of historic timeswhen
such tribes as thePawnee
dwelt in a veryfew
large compactly builttowns
within afew
milesofoneanother.*Strong (1935)
was
thefirst to point out clearlythat in the light of archeology the limitations of environment in the Great Plainswere
not so severe asmany
have beenled to believe. In the long-rangeview, the droughts, excessive temperatures,and
searing winds,which
have playedhavoc withthepresent-day farmerand
hiscommercialventures, are comparatively transient if recurrentphenomena. Under normal
climatic conditions the region is less hostile.
Some
degree of success, at least,must
have attended the efforts of the native peopleswho,
content with a subsistence agriculture, ventured to try theirhand
at wresting alivingfrom
the soil of the short-grassplains.As
anexample we may
cite the recent discovery of pottery-bearing sites yielding definite proof of native farming activities in Chase*The Pawnee after 1800 werevariously credited with 5,000 to 12,000 persons.
I suspect thatifthesewereredistributedamongtheolder sites,manyof thelatter
would be decidedly underpopulated. Even granting that not all the small pre- historicsites were inhabited sj^nchronously, I
am
of the opinion that theremay
attimeshavebeen aboutasmanyIndianfarmersinprehistoricNebraskaas there Vv'ere during the nineteenth century.
A
very considerable proportion of these, moreover,lived in the High Plains area.12
SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL.Id
County, Nebr. (seefig. i,
Ch:
i),and
in Scott County, Kans. (fig. i,Sc: i).°
These
sites lie near the loist meridian,300
miles ormore
west of the Missouri,and
well within the dryHigh
Plains province(pi.3).
Both
haveyieldedcharredcorn, togetherwithbone
hoesmade from
the scapula of thebison.At
the ScottCounty
site (pi. 3, fig. i),where
certainpuebloan influences suggest thepossibility of irrigation, the remains of squashes orgourdswere
also found.The
greatabun- dance of animal bones, as well as the very limited positive evidence of fixed habitations, leads to the belief that hunting probably rankedfirstin thefood
economy,
withhorticultureperhapsa sideline.There
is
no
reason to supposethat the inhabitants of these siteswere
related to thePawnee
or toany
ofthe otherCaddoan
or Siouanvillage tribes of the eastern plains, or that theywere
directly ancestral to the Dakota, Cheyenne,and Arapaho who roamed
thesame
area in the lateeighteenthand
nineteenth centuries. Scantamounts
of iron trade materials indicate an early historic or protohistoric dating.The
siteshave been assignedtothe
Dismal
Riverculture;it ispossible that they willeventuallybeattributabletosome
ofthe semihorticulturalApache
communitieswhich
according to seventeenth-and
eighteenth-century Spanishdocuments
formerly lived in the bison plains.At
present they represent thewesternmost
points atwhich
maize specimens have been reported archeologicallyinthe central Great Plains.In an earlierperiod,before
any European
influenceshad
yetreached the area, horticultural peoples of another sortdominated
the central Great Plains.Most
widelydistributedand
bestknown
are thosewho
left the remains comprising the
Upper
Republican culture (Strong, 1935. VPy 69-124, 245-250, 275-278;Wedel,
1935,and
1940b, pp. 310- 312;Champe,
1936).These
remains occur throughout the Loess Plains to the edge of the Sandhillsand
south to theSmoky
Hill-Kansas
Riverdrainage, with awestward
extension farup
theRepub-
lican (pi. 4, fig. i)
and
Platte basins."They
consist of innumerable small village sites situated nearformer
springs or otherpermanent
wateron
the flood-free terraceswhich
characteristically bordermany
^Wedel, 1940a; unpublished field notesby A. T. Hill, Lincoln, Nebr.
*It isinteresting to notethat in termsof present-dayagricultural regions, the village sites ofthese prehistoricagrarian peoples aremostplentiful in those por- tions of Nebraska and northern Kansas which are assigned to the Corn Belt (see O. E. Baker's
map
in Atlas of the Historical Geography of the United States,pi. 142A). Their rangealso includesadjacentdistricts innorthernKansasnow
givenover to hardwinter wheat.From
surface findsof pottery, itappears that theymay
have inhabited the present corn-wheat zone in northeastern Colorado.NO. 3
CENTRAL GREAT PLAINS WEDEL
I3of the creek valleys.
The
villages includedfrom
a half dozen totwo
or three dozen rectangular pit houses scattered over several acres of ground. Unlike the historicPawnee
villages, these earliercommuni-
ties
were
apparently unfortified.Cache
pits are present in all these sites; they seldom exceed3 or4
feet in greatest depthand
diameter,and
thusaveragemuch
smallerthanthose of the earlyhistoricPawnee.
In
them
are found charred maize, beans, animal bones,pottery, stoneand bone
artifacts,and
other evidences ofhuman
industry. Universally present is thebone
hoe.Charred
corn, cobs,and
beans have been foundinthese sitesas farwestasMedicineCreek
inFrontierCounty, Nebr. Typicalpottery,togetherwithevidence of earth-lodge remains, occurs still farther west inChase
County,and
excavation will prob- ablyshow
thatthe occupants of thesevillages also practiced farming.Inferentially, this
must
have beenon
a small scaleand by methods
closely similar to those described above for the
Pawnee and
their neighbors.The
hoe,and
alsothe cropsevidenced througharcheology,all havehistoriccounterparts. Sincethe prehistoricvillages
were much
smaller, it can be
assumed
that sufficient arableground was
available in the bottom landsclose athand.The
horsewas unknown,
but since the villageswere
scattered widely overmuch
of the choicest bison range it is probable thatample
supplies ofmeat
could be obtainedby
foothunterswhenever
desired.At any
rate, thebone
refuse in their sitesshows
that theUpper
Republican peoples relied probablymore
on thebison than onany
other single species for meat.A somewhat
variantcontemporaneous
manifestation along the Missouri River bluffs has been termed theNebraska
culture. Here, too, arefound
rectangular earth lodges, cache pits, pottery,and
other evidences ofasettledhorticulturalmode
oflife.Animal
bonesindicate that white-tailed deer, elk,and
smallermammals
figuredmuch more
heavily in the native diet than did the presumably
more
distant andless easily obtainable bison. In this respect the nonequestrian pre- historic inhabitants of the immediate valley of the Missouri differed
from
the historic Siouan tribeswho,
mounted, couldand
did travel hundreds of mileswestward
inquest of the bison.Underlyingthewidespread
Upper
Republicanand contemporaneous
manifestations are other pottery-bearing horizons.Remains
designated asWoodland
arefound
in small obscurely situated siteswhich
have so far received scant noticefrom
archeologists. In the ravines of easternNebraska
they occur as artifact-bearing occupational strata exposed innewly
cut banks, with an overburden that variesfrom
6 to25feet ormore
(pi. 5, fig. i). Farther west,as intheHigh
Plains14
SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL.Id
of
Lane
County, Kans.,and
elsewhere, similar strataare often over- Iainby wind-blown
soils. It is still uncertain whether these overlying materialsrepresent short cycles ofabnormallyheavy
precipitation (in the east) or of excessively dry,windy
conditions (in the west), or are dueto slower but long-continued erosional processes.The
extent towhich
theWoodland
groupsdepended on
cultivated crops is also a question since the sole evidences yet reported of horticulture—
atthe
Walker Gilmore
Site in Cass County, Nebr.—
involve only thesquash
and gourd
(Strong, 1935, p. 193).Apparently
contemporaneous
with theWoodland
sites are others along the Missouri in northeasternKansas and
nearby Missouri,which show
a close similarity in several respects to the Hopewellian remains of the Mississippi-Ohio drainage. Evidence of horticultureisgenerallywanting throughouttheHopewellian horizon intheeastern United States, but it has been postulated that such an economic basis
would
have been necessarytoso highly developed acivilization (Setz-ler, 1940, p. 262).
At any
rate, the only Hopewellian-like village site so far investigated seriouslyon
the Missouri yielded direct proof of horticulture in theform
of charred maizeand
beans (Wedel, 1938, p. loi).The bone
hoe is absent, probably having been replaced by implements of stone or other material.To what
extent the localeconomy was
basedon
gardening is not clear, but cache pits possibly for storage of domestic cropswere
relatively plentiful.These
yielded considerable quantities of deerand
raccoon bones, but almostnone
of the bison. Since thiscomplex
does not appear to have penetrated very far westbeyond
the Missouri it is ofminor
interest so far as primitive horticultureintheGreat Plainsisconcerned.The
prehistoricpottersand
farmers of the central Great Plains are thought tohavemoved
into the regionfrom
a general easterly direc- tion. If theWoodland
peoples practiced horticulture, aswe know
the laterUpper
Republican groups did, then at leasttwo
principalwaves
ofimmigration by nativefarming
economies are indicated.How
long the interval separating thesetwo
iswe
do notknow
; there isno
clear proofthat theUpper
Republican developeddirectly out of theWood-
land, though
some
contactbetween
thetwo
is indicated (cf.Wedel,
1940b, p. 346).Both
groups spreadwestward
into theHigh
Plains, nearly or quite to the present Colorado line.There
isno way
of telling whether eitherfound
the western plains uninhabited. It isabundantly clear that hunting economies
had
occupiedmuch
of the regionata farearliertime, asshown by
thepresenceofFolsom,Yuma,
and
other ancient nonagricultural remains. Since huntingtribesagainNO. 3
CENTRAL GREAT PLAINS WEDEL
15controlled the areain historictimes, itcanbe inferred thatoccupation by native subsistence economies based
on
maize constituted a rela- tively brief interludewhich was
precededand
followedby
verymuch
longer periods of occupancy
by nomadic
orseminomadic
bison hunters.The
first Spanish explorers to visit the western plains in the six- teenthcenturyfound them
occupiedby nomadic
Indianswho had
"no other settlement or location thancomes from
travelingaround
with the cows." Interms ofmodern
linguisticgroups, these arethoughtto have been Athabascans, probablyApache
orLipanan
(Harrington, 1940, p. 510). Justwhen
they arrived is not clear, butby
1541 thelittle farming communities over
most
of theUpper
Republican areahad
evidently been given up.At any
rate, there isno
mention in the narratives of theCoronado
or subsequent expeditions of anything corresponding to theUpper
Republican village sites as these have been definedby
archeology.The
firstpermanent
settlements seenby
the sixteenth-century Spaniards inwhat
isnow
centralKansas were
large,
some
ofthem
estimatedtonumber 200
houses (Winship, 1896).The
houseswere
of straw,and
the natives are described as having corn, beans,and
melons. Allofthis is reminiscent of the largeproto- historic villagesfound
in Riceand McPherson
Counties, Kans.Insofar as it concerns fixed villages of horticultural peoples it also calls to
mind
thegreat fortifiedtowns
of the protohistoricPawnee on
theLoup
River inNebraska —
possibly theHarahey
of Coronado's chronicles (see Lesserand
Weltfish, 1932, p. 12). Farther west, accordingtothese explorers,were
onlymigratory hunterswhose mode
of life
was
essentially thesame
as that of the historic hunters except for innovations taken overby
the latterfrom
whitemen. The
cause or causes for the observedabandonment
of the western plainsby
native farmingpeoples in late prehistorictimesis one of theproblemsnow
confrontingplainsarcheologists.DROUGHTS AND PREHISTORY
Van Royen
(1937, p. 637) hasremarked
that "there is little doubt in theminds
of students of weatherand
climatethat wide borderland areas betweenhumid and
arid regions willalways besubject torecur- rentdroughtsof varyingdurationand
intensity, such as those experi- enced in historical times. Also, before thedawn
of recorded history droughts occurred,some
ofwhich were
brief, others evidently very long."The
Great Plains constitute just such a borderland zone, with aridregionson
the westand
southwestand humid
regions to the east.We may
turn, therefore, to a consideration of certainphenomena
l6
SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL.Id
which
suggest drought conditions during the prehistoric occupancy of thecentral GreatPlains, keepinginmind
particularlytheirpossible effectson
the native horticultural peoples.Two
sites inNebraska
are of especial interest in this respect.They
are Signal Butte in the
North
Platte Valley near theWyoming
line,and
theLynch
Siteon
lowerPonca Creek
inBoyd County
about 12 milesfrom
theSouth Dakota
border. Archeological remainsat Signal Butte and theirgeologic context have already been detailed elsewhere (Strong, 1935, p. 224-239). Briefly, they consist of three prehis- toric levels ofhuman
occupancyseparatedfrom
one anotherby
layers of wind-deposited loessfrom
18 to24 inches thick.The
topmost cul- turalhorizon includespottery ofUpper
Republicanand Dismal
River types,and may
beno more
than300
to500
years old.The
middleand
lower strata, yieldingno
pottery, are believed to representmuch
older hunting cultures.The
occupational strata consist in part ofhumus, and presumably
indicate periods of increased humidity.The
intervening sterile layers are attributed to dry,windy
periods.Van Royen
suggests that "one or both of the sterile strataon
Signal Buttemay
correspond to a long dry periodfrom
three to four thousand yearsago
or that theymay
be even older." Strong's esti-mate
ismore
generous, with 8,000 to 10,000 years given as the pos- sible timewhich
has elapsed since level I (the lowest)was
inhabited.At Lynch (Van Royen,
1937, p. 638), the archeological remains cover a considerable areaon
the bluffs just north ofPonca
Creek.As
revealed in excavationsby
the University of Nebraska, theirmost
striking feature is the presence of "a thick darkstratum,which
near the ends of the [University test] trencheswas found
to lieabout a foot beneath the surface
and which was
covered near the centerby
eight feet of sand. . . ."These
sands, according toVan Royen,
are wind-deposited,and were
derivedfrom
the water-laid Pleistocenesandson
thehighterracenorthand
northwestof theareas of accumulation.The
topsoil to a depth of 12 to 18 inches has been colored grayby
plant matterand
still supports a fair stand of grass.Wind
activityheretoday isnot greatenough
to produce dunesorsand drifts exceptwhere
the grass cover has been killed offby
cultiva- tion orby
overgrazing.The
gray topsoil is too deep to be accounted forby
thefew
decadeswhich
have elapsed since introduction of theplow
in the district,and
"since the culture stratum does notshow
any influence of the whiteman"
it is suggested that the period ofpronounced
sandmovement
antedates thecoming
of Europeans.The
observed conditionswould
imply a prolonged period of lowerNO. 3
CENTRAL GREAT PLAINS WEDEL
IJrainfall
and
destruction of the grasses, followedby
increasedwind
actionon
thedenuded ground
surface.The
question of dating even approximately the Indian occupation at Lynch,and
through this the droughtwhich must
have followedit closely, hinges verylargely on accurate identification of thearcheo- logical materials in the dark stratum.
A
detailed reporton
these has not yet appeared, but certain generalizations can be venturedon
the basis of sherds collected on the surface during several visits Imade
before
and
atthe time of the excavations (Wedel, 1940b,p. 317; see alsoVan Royen,
1937, p. 647).The
sandy overburden hasblown
extensivelywherever modern
cultivation is under way, this being especially trueon
fields afew hundred
yards east of the diggings.On
thedenuded
village surface therewere abundant
remains,and
hearths could befound
only afew
inches below theplowed
topsoil.A
collection of severalhundred
potsherds includingnumerous
rim pieces, as well asmany end
scrapers, projectile points,and
other chippedforms
indicated an interesting mixture of types.One group
of sherds exhibited features characteristic of theUpper
Republican horizon; others, including afew
rim pieces with handles,were
remi- niscent ofNebraska
culture remains.A
third group, inwhich
shell temperingwas
noted, included incised or trailed decoration, rims,and
handles resembling inmost
particulars theOneota
wares of the upper Mississippiand
Missouri Valleys.A few
sherds bore parallel ridges on their exterior surfaces, apparentlyproduced by
thesame
paddling technique used so widelyby
thePawnee, Mandan,
Arikara,and
other tribes in protohistoricand
historic times.The Upper
Republicanand Nebraska
culture manifestations throughout the central Great Plains have been extensively worked, and inno
case has iron, glass, orotherevidence of contact with whitemen
been noted.On
the other hand,Oneota
village sites in Iowa, Missouri,and Kansas
have yielded smallamounts
of such material.All the available evidence indicates that in the Missouri Valley
and
westward, theOneota
remains are late.Some
of the sitesmay
ante- date slightly the arrival locally of whitemen,
but the strikinglyuniform
character of the remains overmost
of the area occupiedwould
indicate that theywere
not spread over a very long period of time.It is not clear whether all the several pottery types noted at
Lynch
occur together or whether there
was
a stratified succession of wares.Itis possible that alatephase of the
Upper
Republican survived here for a time alongsidean
unclassified peripheral variant of theOneota
l8
SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL.Id
manifestation. In
any
case,the fact that pottery with definiteOneota
affinities underlies the sand deposits is strong evidence that the latter
were
laiddown
within the last three to five centuries.Much
less striking than the sand accumulations at theLynch
site or the stratified remains at Signal Butte is the occurrence atmany
sites in the central Great Plains of a soil cover equally suggestive of dry,
windy
conditions. In a greatmany
localities soil profileshave
been partially obliteratedby modern
agricultural activities, but hereand
there in stream terraces can still be seen evidences of a darkhumus
zone buriedunder
lo to 30 inches of fine light-gray loess, without doubt wind-laid.That
this oldhumus
zonewas
at one time an inhabited surface is indicatedby
archeological observations. In the Republican drainage of southern Nebraska, as for example,on
Medicineand
Lost Creeks,Upper
Republican pit-house sites have beenfound
excavated into thehumus
line, with potsherds, bones,and
similar village refuse littering thesame
level (Wedel, 1934, pp. 149, 152, 154; Strong, 1935, p. 76).That
these houseswere
notdug from
the present surface isshown
by the presence of culturally sterilewind-blown
materialswhich
extend evenlyand
uninterruptedly across the old house basinsand
over the adjoining detritus-strewnhumus
zone.The
present surface of this soil cover is usually flatwith
no
suggestion of dunes or drifts.The
material itself is finer than that atLynch, and
superficially resembles rather closely the sterile layers separating culture horizons at Signal Butte.Upper
Republican village sites blanketed in this fashion occur throughout the Republican River basin in southernNebraska from
Frontier, or possibly Hayes,County
eastward at least toWebster
County. I have observed a similarthough
thinnerunbroken
cover- ingon Upper
Republican sites in the lower valley of theNorth Loup
River (pi. 4, fig. 2). Since widely scattered sites are thus involved the factors responsiblemust
have been ofmore
than local magnitude.At
thesame
time, itmust
be pointed out that otherUpper
Republican sites in theLoup
drainage aremarked by
shallow surface depressions, indicating eitherthat less soilwas
deposited overthem
or else that the housesand
cacheswere dug
through the cover- ingmaterialand
are thus later.The
villages occupiedby
thePawnee
on
the lowerLoup and
Platte Riversseem
never tohave
been thus buried,and
the old lodge circleswere
always clearly visible before their obliterationby
the plow. Still farther east, along the Missouri, theNebraska
culture siteswhich
are believed tohave
been occupied synchronously withsome
of theUpper
Republican villages, charac-NO. 3
CENTRAL GREAT PLAINS WEDEL
IQteristically
show
deep, well-marked house pitswhere
they are not under cultivation.Ithas alreadybeen noted that
Woodland
sherdsand
stone artifacts have beenfound
inwesternKansas and
inNebraska
in similarburiedhumus
strata.Wherever Upper
Republicanand Woodland
remains occur on thesame
location, the latter are always at the bottom.For
example, near Healy,inLane
County, Kans.,Upper
Republicanvillage remains (pi. 5, fig. 2, stratumA)
occur just below the wind-eroded surface of several small terraces. Below,and
separated by a few inchestonearly2 feetofsterilegraysoil (pi.5, fig. 2, stratumD),
isa dark-gray stratum yielding hearthsand Woodland
artifacts (pi. 5, fig. 2, stratum B).'The number
ofknown
similar occurrences in the Republican,Loup, and
othermore
northerlyrivervalleysis increasing.Insofar as they relate to prehistoric
man,
the dust deposits of the Republican Valleyand
adjacentareas,as justdescribed,have not been closelystudiedby
physiographersorgeologists. Itshouldbenotedthat the repeated dust storms of the past decadeaccompanying
droughtswhich wiped
out the corn crop inmany
localities have not produced comparable formations in the Republicanand Loup
Valleys, though elsewhere deep driftsand
dunes have beenformed where
fences, hedges,and
other obstructionstendtobreakthewind. Itis not certain thatthese deposits resultfrom
asingle short, intense drought such as that evidenced at Lynch. It has been suggested tome
that they canmore
reasonably be interpreted as agradualaccumulation over aperiod ofmany
years.At
thesame
time, the factthat the dust coversa darkhumus
stratumwhich
often contains archeologicalremainswould seem
to indicate that a period of fairly rapid deposition followed a
more humid
intervalwhich
lastedlongenough
to produce avegetativecoverand
tobecome
thehome
of sedentary farmingpeoples. Inotherwords,I see
no
reasonwhy
thedifferent strata cannot be viewed as evidence ofclimatic fluctuationsanalogoustothose inferredfrom
the findingsat Signal Butte.Carefully controlled studies inthe past decadehave
made
it possible toarrangethemajor
archeologicalhorizons of the centralGreat Plains in sequential order (seesummary
inWedel,
1940b).Where
evi- dences of severe drought, or of prolonged periods of subnormal pre- cipitationand
consequent increased soil deposition, are definitely linked with these horizons itmay
be possible to determine the ap-'
What
is possibly a third occupation zone here is indicated as stratumC
in plate5,figure2; fromit cameonlybroken animal bonesand fire-cracked stones, hencethe horizonremains unidentified.20 SMITHSONIAN MISCELLANEOUS COLLECTIONS
VOL. lOIproximate time involved.
At
Signal Butte, as already indicated, the dry periods have been tentatively assigned an antiquity of several millenia.At
Lynch,on
the other hand, the archeological evidence pointstoward
a verymuch more
recentdrought—
one that might haveoccurred as late as the sixteenth or seventeenth century."
The
dust blanketon
theUpper
RepublicansitesinsouthernNebraska must
havebegun
to accumulate at least400
years ago, since there is evidence that thePawnee were
living in large villages in easternNebraska
in Coronado's time (1541) butnone
whatever thatcontemporary
horti- cultural earth-lodge-using peoples lived in the western plains.The
estimates of age here given are inferential,and
reston
archeo- logicaland
historical data.At
present they cannot be checkedby
pre-cise
methods
suchasdendrochronology offers intheSouthwest.How-
ever,as already indicated, red cedar {Juniperus virginiana) is widely distributed throughout the
High
Plains,and
there isgood
evidence that western yellow pinegrew
scatteringly eastward to the 99th meridian as late as the nineteenth century. Moreover, it should be borne inmind
that charred pineand
juniper have beenfound
in*M. E. Kirby, of the U. S. Engineers office at Omaha, Nebr., has called
my
attention torelevant databy
Upham
(1895,p.594) concerning fluctuations inthe surfacelevels of certain glacial lakes inNorth Dakota. DevilsLakeand nearby Stump Lake in the northeastern part of the State present highly irregular out- lines and arebelieved to occupythe valley of apreglacial river which has been elsewhere buried with drift. In historic times Devils Lake reached its highest levelabout 1830. At about the same time occurred record high-water levels inRed River and in the Great Lakes. Thus, 1830 would appear to represent the high stage in a period of heavy precipitation. The shoreline of DevilsLake at that time is indicated by a line of heavy timber. Between this and the recent shoreline
Upham
noteda standof smaller trees which in 1889 showedamaxi-mum
of57 annual growth rings. Duringthe 1830 high stage the waters flowed into Stump Lake a few miles tothe southeast, but the latter never attainedthe same level as Devils Lake owingto evaporation. Theearly postglacial outlet ofStump Lake into the Sheyenne River was dry during the 1830 high water, as
shownby astandoflarge timbergrowingacrossthechannel. Thistimbercorre- sponds to thatmarking the 1830water linein Devils Lake.
At present, in the bed of Stump Lake, North and South Washington Lakes, andLakeCoe,all situatednear Devils Lake, thereareold stumpsof treeswhich grew when the lakes were dry some time before the 1830 rise.
Many
of these havebeen uprootedandusedfor fuel.Some
ofthestumpsonthelakebedshowed asmany as 115 annual rings, indicatingwell overa century of deficient rainfall.It is not known just when the protracted period of desiccation here indicated
came to an end, but it must have been long before 1830, since
many
years of heavy rainfall would be required to refill the lakes.