430 GEOLOGY OF NORTHWESTERN TEXAS. 



DIP OP THE TRIASSIO, PERMIAN, AND CARBONIFEROUS STRATA. 



The following summary of the dip of the strata, estimated by actual meas- 

 urements along long lines, will give an idea of the inclination of the strata at 

 different localities. There are places where the dip will be greater than that 

 given, and there will be places also where it will be less. It will be observed 

 that the dip of the strata becomes less as we go northwestward, or on the di- 

 rection of the dip. 



The dip is given as a general average of the various divisions mentioned 

 elsewhere in this Report: 



TRIASSIC. 



Dockum Beds. 

 The approximate dip is southeast twenty-five to thirty feet to the mile. 



PERMIAN. 



Double Mountain Division. 

 The approximate dip is a little west of northwest, and averages about 

 thirty feet to the mile. The upper part of the division is much folded, and 

 the dip in amount or direction is not uniform. 



Clear Fork Division. 

 The approximate and average dip is northwest forty feet to the mile. 



Wichita Division. 

 The approximate and average dip is northwest thirty-five feet per mile. 



CARBONIFEROUS. 



Albany Division. 



In the Northern Field the approximate and average dip is northwest forty 

 feet to the mile. 



In the Central Field the approximate and average dip is a little west of 

 northwest thirty feet to the mile. 



Canyon Division. 



In the Northern Field the approximate and average dip is northwest sev- 

 enty-five feet to the mile. 



In the Central Field the approximate and average dip is north 50° west 

 fifty feet to the mile. 



Strawn Division. 



In the Northern Field the approximate and average dip is north 30° west 

 ninety feet to the mile. 



