BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



VOL. 33. PP. 805-852 NOVEMBER 2. 1922 



PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



SOME NEW FACTS BEARING ON CORRELATIONS OF 

 CHESTER FORMATIONS 1 



BY E. 0. ULRICH 



(Read before the Paleontological Society December SO, 1921) 



CONTENTS 



Page 

 Introduction 806 



General statement 806 



Miscorrelations of the Cypress sandstone 806 



The 1905 report on western Kentucky 808 



Ulrich's 1905 subdivisions of the Chester 808 



Publications on Chester formations in past decade 810 



Matters in controversy with Professor Weller 811 



The report on Hardin County, Illinois 813 



The locality near Levias, Kentucky 815 



Comparisons as to relative abundance and quality of evidence 818 



Chester types in the Fredonia fauna 819 



The Upper Ohara fauna 820 



Occurrences of Platycrinus, Dizygocrinus, and Pugnoides in the Upper 



Ohara . 821 



Field investigations in 1921 823 



Review of itinerary 823 



Lower Chester section in Sainte Genevieve County, Missouri 825 



General statement 825 



A marine fauna in the Aux Vases sandstone 828 



Fauna in top shale of Sainte Genevieve limestone 829 



Lower Chester section in Union County, Illinois 830 



Difficulties in correlating the Union County section 831 



The fauna of Bed IX of the section in Union County, Illinois 833 



Unquestioned Paint Creek beds in the Union County section. 836 



The section in Hardin County, Illinois, and Crittenden County, 



Kentucky 837 



The section in Caldwell and Christian counties, Kentucky 837 



The sections in southeastern Kentucky and northern Alabama . . . 839 



Local occurrence of crinoid colonies 840 



1 Manuscript received by the Secretary of the Society June 7, 1922. 

 Published by permission of the Director of the U. S. Geological Survey. 



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