Geologic Cross-Section of North Central Texas
Kns - Nacatoch Sand   
Kne  - Neylandville Marl  
Kmb - Marlbrook Marl  
Kpg - Pecan Gap Chalk   
Ko - Ozan Formation (clay) 
Kau - Austin Chalk   
Kef - Eagle Ford Formation (shale) 
Kwb - Woodbine Formation  
Kgm - Grayson Marl    
Kpd - Pawpaw Fm., Weno Limestone, Denton Clay (undifferentiated)   
Kfd - Fort Worth Limestone and Duck Creek Fm.   
Kki - Kiamichi Formation  
Kgw - Goodland Limestone and Walnut Clay (undivided)  
Ka - Antlers Sand