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Ogallala Formation of Northern Kansas

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Contents

Abstract

Introduction

General aspects of the formation

Definitions and type localities

Methods of Correlation

The "Algal limestone"

Bedrock configuration

Volcanic ash lentils

Distinctive rock types

Opal cemented rock

Chert

Bentonitic clay

Marl

Stratigraphic sequence

Fossil vertebrates, mollusks, and plants

Volcanic Ash Falls

Calvert bed

Rawlins bed

Fort Wallace bed

Dellvale bed

Reager bed

Reamsville bed

Paleontology

Fossil vertebrates

Wray local fauna

Edson local fauna

Rhinoceras Hill local fauna

Lost Quarry local fauna

Long Island Quarry

Fossil mollusks

Fossil plants

Seeds from the Valentine member

Seeds from the Ash Hollow member

Seeds from the Kimball member

Stratigraphy

Valentine member

Ash Hollow member

Kimball member

Summary

Measured Sections

References

Plate


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Kansas Geological Survey, Geology
Placed on web Aug. 4, 2011; originally published March 1956.
Comments to webadmin@kgs.ku.edu
The URL for this page is http://www.kgs.ku.edu/Publications/Bulletins/118/01_contents.html