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Pleistocene Geology of Kansas

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Table of Contents

Abstract

Introduction

Geologic Processes

Glaciation

Fluviatile sedimentation

Eolian sedimentation

Weathering

Soil development

Soil-forming intervals

Erosion and pedimentation

Principles of Classification and Correlation

Categories of stratigraphic units

The Pleistocene time scale

Cyclical units in the Kansas Pleistocene

Stratigraphical classification of Pleistocene deposits

Criteria used in Pleistocene correlation

Lithologic continuity

Petrographically distinctive volcanic ash

Molluscan faunal assemblages

Morphology and continuity of buried soils

Stratigraphic succession

Physiographic expression

Kansas in Relation to the Midcontinent Region

Pleistocene Stratigraphy in Kansas

Nebraskan Stage

David City formation

Definition

Character and distribution

Age and correlation

Nebraska till

Definition

Character and distribution

Age and correlation

Blanco formation

Definition and subdivisions

Character and distribution

Age and correlation

Aftonian Stage

Kansan Stage

Atchison formation

Definition

Character and distribution

Age and correlation

Kansas till

Definition

Character and distribution

Age and correlation

Meade formation

Definition and subdivisions

Character and distribution

Age and correlation

Yarmouthian Stage

Sanborn formation

Illinoian Stage

Crete member, Sanborn formation

Loveland member, Sanborn formation

Sangamonian Stage

Wisconsinan Stage

Early Wisconsinan alluvial deposits

Peoria member, Sanborn formation

Bradyan Substage

Late Wisconsinan alluvial deposits

Bignell member, Sanborn formation

Recent Stage

Sand dune tracts

Valley alluvium

Stratigraphic Paleontology

General considerations

Molluscan faunal assemblages in Nebraskan deposits

Molluscan faunal assemblages in Kansan deposits

Molluscan faunal assemblages in Illinoian deposits

Molluscan faunal assemblages in Wisconsinan deposits

The basal or Farmdale faunal zone

The lower or Iowan faunal zone

The upper or Tazewellian faunal zone

Post-Bradyan molluscan assemblages

Summary of Pleistocene Drainage Changes

Late Tertiary drainage

Nebraskan drainage

Kansan drainage

Illinoian drainage

Wisconsinan drainage

The Kansas Landscape

Bibliography

Plates

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Kansas Geological Survey, Pleistocene Geology
Comments to webadmin@kgs.ku.edu
Web version August 2005. Original publication date Nov. 1952.
URL=http://www.kgs.ku.edu/Publications/Bulletins/99/01_contents.html