WICHITA FORMATION OF NORTHERN TEXAS in 



eastern corner of Haskell County, thence irregularly south until 

 it meets the Cretaceous again in Concho County. 



As thus outlined, the "Red Beds" occupy an area of irregular 

 shape 80 to 100 miles in width in the southern portion, while at 





is J% 





k'U"'dr-- ' f- ! ir 



Quaternary 



Permian I' . '] 



Recent 

 Deposits 



Seymour 

 Gravel 



Undifferentiated 

 Clear Fork and 

 Double Mountain 



Wichita 

 Formation 



Pennsylvanian 



Cisco 

 Formation 



Canyon 

 Limestone 



Strawn 

 Formation 



the north they extend eastward fully twice that distance along the 

 south side of Red River. If a line be drawn from a point on Red 

 River near the mouth of Pease River southwestward through 

 Seymour to the northeastern corner of Haskell County and thence 

 southward, it will mark approximately the eastern boundary of a 

 series of red clays and red sandy shales containing gypsum in vary- 

 ing amounts, to which the names Clear Fork and Double Mountain 



