CONTENTS 



INTRODUCTION 9 



STRATIGRAPHY 13 



Rocks underlying the Weno and Pawpaw Formations 



Pre-Comanchean *" 



Comanchean * 4 



Thickness changes 



Lithological changes 



Weno and Pawpaw Formations 



Thickness changes 25 



North-South changes 25 



East-West changes 26 



Lithological changes 



Pawpaw Formation > 



Weno Formation 35 



Stratigraphic Correlation 40 



North Central Texas and Southern Oklahoma 40 



South Central Texas 40 



West Texas and Mexico 41 



Europe and North Africa 4 a 



PALEONTOLOGY 44 



The Weno Fauna 45 



The Pawpaw Fauna 4 ? 



Comparison of Pyrite Faunae 53 



Texas 53 



Kiamitia Clay Fauna 54 



Duck Creek Marl Fauna 64 



Denton Clay Fauna '. 55 



Grayson Fauna 5(5 



Del Rio Clay Fauna 58 



Summary of Pyrite Faunae 60 



Europe and Africa 



DESCRIPTIONS OF SPECIES 68 



CEPHALOPODA 68 



Nautilus texanus Shumard 6S 



Nautilus sp 



Hamites tenawa Adkins and Winton 69 



Hamites sp. aff. armatus Sowerby 



Ancycloceras bendirei n. sp '" 



Hamulina wortkensis n. sp 



Baculites comanchensis n. sp ? 4 



Turrilitcs bosquensis n. Sp 



Turrilites worthensis Adkins and Winton 78 



Turrilites sp 



Scaphites hilli Adkins and Winton 79 



