Bedrock geology of the Paducah 1 ̊x 2 ̊Quadrangle, Illinois, Kentucky, and Missouri

66 Pages·1995·4.4 MB·English

by  Nelson, W. John

Digitized by the Internet Archive
in 2018 with funding from
University of Illinois Urbana-Champaign
https://archive.org/details/bedrockgeologyofOOnels

1557
Gb-102
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BEDROCK GEOLOGY OF THE PADUCAH
1° x 2° QUADRANGLE
Illinois, Kentucky, and Missouri
W. John Nelson
Bulletin 102 1995
Department of Natural Resources
ILLINOIS STATE GEOLOGICAL SURVEY

3
BEDROCK GEOLOGY OF THE PADUCAH
1° x 2° QUADRANGLE
Illinois, Kentucky, and Missouri
W. John Nelson
Bulletin 102 1995
ILLINOIS STATE GEOLOGICAL SURVEY
William W. Shilts, Chief
Natural Resources Building
615 East Peabody Drive
Champaign, IL 61820-6964
Cover photo The view is southwest from the crest of Pine Hills across La Rue
Swamp on the Mississippi River floodplain, northwestern Union County. The
bluffs are composed of the Grassy Knob Chert overlying the Bailey Limestone
(both Lower Devonian). Photo by Joel Dexter.
ACKNOWLEDGMENTS
The map and report for this project were prepared as part of the Contermi¬
nous United States Mineral Assessment Program (CUSMAP), a cooperative
program involving the U.S. Geological Survey and various state geological
surveys. Many individuals participated in CUSMAP and helped prepare the
bedrock geologic map and report. The following people reviewed the map
and report, and contributed valuable source materials: Dewey H. Amos,
James W. Baxter, Garland Dever, Anne Graese, Mark A. Middendorf, Martin C.
Noger, Wilds W. Olive, Charles E. Robertson, Thomas L. Thompson, and
John W. Whitfield.
ILLIN O I S
Printed by authority of the State of Illinois/1995/1200
DEPARTMENT Of
printed with soybean ink on recycled paper
NATURAL
RESOURCES
CONTENTS
ABSTRACT 1
INTRODUCTION 2
STRATIGRAPHY 3
Precambrian and Cambrian Rocks 3
Ordovician System 5
Canadian Series: Knox Group 5
Champlainian Series 6
Cincinnatian Series 8
Silurian System 9
Alexandrian Series 10
Niagaran and Cayugan (?) Series: Bainbridge Formation 10
Silurian (?) and Devonian Systems 10
Tamms Group 10
Middle Devonian Series: Muscatatuck Group 11
Mississippian System 13
Kinderhookian Series 13
Valmeyeran Series 13
Chesterian Series: Pope Group 18
Pennsylvanian System 24
Cretaceous System 26
Tertiary System 27
Paleocene Series: Midway Group 27
Eocene Series 27
STRUCTURAL GEOLOGY 28
Regional Setting 28
Tectonic History 28
Individual Structures 30
REFERENCES 34
ADDENDUM TO PLATES 40
TABLE
1 Changes in formal stratigraphic nomenclature introduced in this report 3
FIGURES
1 Generalized stratigraphic column 4
2 Relationships of lower and middle Mississippian rocks in study area 14
3 Differences in Mississippian stratigraphic nomenclature between
Illinois and Kentucky 16
4 Facies and nomenclature changes in lower part of Pope Group 19
5 Carbondale Formation as defined in this report 25
6 Major structural features of the Paducah 1° x 2° Quadrangle 29
PLATES
1 Paducah 1° x 2° quadrangle geologic map
2 Bedrock geology of the Carbondale 30 x 60-minute quadrangle
3 Bedrock geology of the West Frankfort 30 x 60-minute quadrangle
4 Bedrock geology of the Cape Girardeau 30 x 60-minute quadrangle
5 Bedrock geology of the Paducah 30 x 60-minute quadrangle