388 E. T. DUMBLE — CBETACEOUS OF TEXAS AND MEXICO. 



has a direction closely approaching that of the later of the systems of 

 dikes, and the nearly north-and-south direction of the Cretaceous-Tertiary 

 contact in Maverick county is probably due to a monoclinal fold of the 

 Cretaceous similar to those observed west of it. This gave rise to an 

 embayment in the Tertiary which stretched northward nearl}^ or quite 

 to Uvalde, which may well be called the Nueces embayment, since that 

 stream now drains the entire area of the present surface exposure of 

 these deposits. 





