Bedrock geology of the Paducah 1 ̊x 2 ̊Quadrangle, Illinois, Kentucky, and Missouri PDF
Preview Bedrock geology of the Paducah 1 ̊x 2 ̊Quadrangle, Illinois, Kentucky, and Missouri
Digitized by the Internet Archive in 2018 with funding from University of Illinois Urbana-Champaign https://archive.org/details/bedrockgeologyofOOnels 1557 Gb-102 c .3 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
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