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ILLINOIS WALLEY GEOMORPHOLOGY IN THE KOSTER SITE
KOSTER SITE DEPOSITIONAL HISTORY
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abrupt boundary alluvial fan alluvial-fan Altitude Archaic archeological brown to dark Butzer Campbell Hollow charcoal charcoal fragments clear boundary coarse pores colluvial body colluvial slope colluvium cores cultural debris cultural horizons dark brown 10YR dark grayish brown dark yellowish brown Deer Plain Deer Plain Terrace diamicton dolomite episodes erosional facies Figure fluvial friable friable to firm gastropod gastropod shells geomorphic gradual boundary grayish brown 10YR Hajic Holocene Horizon 6A Illinois River incision interval Kampsville Keach School Terrace Koster alluvial Koster Creek Koster site lacustrine lake Lake Calhoun loess lower alluvial fan lower Illinois Valley Macoupin Creek macroblock excavations medium and coarse medium pores medium subangular blocky mottles Napoleon Hollow noneffervescent paleosols pebbly pedogenic radiocarbon dates record reddish brown sand secondary sedi sedimentation rates silt loam silty clay slightly effervescent soil formation Soil g stratigraphic strongly effervescent strongly expressed surface thin silans tion tributary variable violently effervescent weakly expressed yellowish brown 10YR