PENNSYLVANIAN STRATIGRAPHY OF NORTH 

 CENTRAL TEXAS 



RAYMOND C. MOORE and FREDERICK B. PLUMMER^ 



University of Kansas, Lawrence, Kansas, and Roxana Petroleum Corporation , 



St. Louis, Mo. 



Introduction 



Previous Work 



Recent Investigations 



Acknowledgments 

 General Description oe the North Central Texas Pennsylvanian 



Surface Distribution 



Lithologic Character 



Thickness 



Topography 



Divisions 

 Bend Group 

 Strawn Group 

 Canyon Group 

 Cisco Group 

 Physical History of the Texas Pennsylvanian 



INTRODUCTION 



The Pennsylvanian strata of north central Texas furnish a 

 beautifully exposed and nearly complete section of the rocks of 

 this period, exceedingly variable in lithologic character and prolific 

 in well-preserved fossils. Yet because of their isolation and the 

 semiarid, somewhat forbidding character of the country in which 

 they outcrop, detailed study of them has been long delayed. The 

 discovery in recent years of great deposits of petroleum within this 

 area has brought to it many geological workers, and has served as 

 a great stimulus to the study of the stratigraphy, differentiation, 

 and correlation of its formations. 



^ Published by permission of the Director, Bureau of Economic Geology and 

 Technology, University of Texas. 



