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Smoky Hill Chalk Member, Niobrara Chalk

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Contents

Abstract

Introduction

Statement of the Problem

Previous Investigations

Location and Description of the Area

Geography

General Geology

History of Stratigraphic Nomenclature

Adjacent Stratigraphic Units

Fort Hays Limestone Member, Niobrara Chalk

Sharon Springs Shale Member, Pierre Shale

Stratigraphy of the Smoky Hill Chalk Member

Lithology

Stratified Chalk

Bioturbated Chalk

Granular Chalk

Bentonite

Shelly Zones

Uintacrinus Limestone

Nodules

Register of Localities

Locality 1

Locality 17

Locality 12

Locality 13

Locality 19

Locality 18

Locality 22

Locality 23

Locality 20

Locality 24

Locality 25

Locality 21

Marker Units

General Statement

Marker Unit 1

Marker Unit 2

Marker Unit 3

Marker Unit 4

Marker Unit 5

Marker Unit 6

Marker Unit 7

Marker Unit 8

Marker Unit 9

Marker Unit 10

Marker Unit 11

Marker Unit 12

Marker Unit 13

Marker Unit 14

Marker Unit 15

Marker Unit 16

Marker Unit 17

Marker Unit 18

Marker Unit 19

Marker Unit 20

Marker Unit 21

Marker Unit 22

Marker Unit 23

Physical Correlation

Biostratigraphy

Western Interior Standard Zonation

Chronologic Comparison of Pueblo, Colorado, and Kansas Sections

Biostratigraphy of Smoky Hill Member in Kansas

Petrology of the Smoky Hill Member

Stratified Chalk

Bioturbated and Granular Chalks

Skeletal Limestone

Diagenesis

Depositional Environment

Regional Setting and Stratigraphic Framework of Smoky Hill Deposition

Origin of Chalk Components

Physical Aspects of the Environment

General Statement

Depth of Deposition Temperature

Substrates and Bottom Conditions

Salinity

Paleoecology of Macroinvertebrate Fossils

Preservation

Inoceramids

Radiolitids

Ostreids

Pectinids

Bakevelliids

Cirripeds

Uintacrinids

Cephalopods

Trace Fossils

Infaunal Body Fossils

Community Structure and Habitat

Gas Production from the Smoky Hill Member

Summary and Conclusions

Acknowledgments

References

Appendix

General Statement

Descriptions of Sections

Plates


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Kansas Geological Survey, Geology
Placed on web Feb. 20, 2015; originally published Dec. 1982.
Comments to webadmin@kgs.ku.edu
The URL for this page is http://www.kgs.ku.edu/Publications/Bulletins/225/01_contents.html