374 DRAKE — THE rTEOLOrxY OF INDIAN TERRITORY. [Sept. 3, 

 Vertical Distance between the Grady and Ale A tester Coal Beds. 



LOCALITIES. FEET. 



One mile east of Fanshaw 2500 



Two miles east of Red Oak 2500 



West of Cameron .' 2000 



North of Brazil 2000 



South of Milton 2000 



North of Wild Horse Prairie 1300 



East of Krebs 1000 



Vertical Distance between the Mc A tester and May berry Coal Beds. 



LOCALITIES. FEET. 



Cavaniol mountains. . , 3000 



Northeast end of Sans Bois mountains 2200 



West end of Sans Bois prairie 1500 



These estimates show a marked tendency throughout the whole 

 division to decrease in thickness towards the west and northwest. 



The following sections will show the general stratigraphy of the 

 two lower coal beds and the intervening strata in the Choctaw coal 

 fields : 



South side of North side of Northwest of 

 One mi. west West of Buck Creek Buck Creek Wild Horse 



Fanshaw. Cameron. Prairie. Prairie. Prairie. 



FEET. FEET. FEET. FEET. FEET. 



Coal ih ih li li 



Shale 1200 



Sandstone. . . ' 10 



Shale 200 100 200 200 300 



Sandstone. . . 25 10 zoo 25 50 



Shale 2000 300 600 900 400 



Sandstone... 50 25 15 25 100 



Shale 300 400 1000 1000 500 



Coal.... 33443 



Two sandstones and three clay shale beds usually form the 

 sequence of strata between the two lower workable coals. This 

 prevailing condition is shown in the above sections. This usual 

 sequence, however, is not constant, for in some places, as north- 

 west of Alderson, only one sandstone intervenes, and in other 

 places, such as west of Cameron, there are three. This table is not 

 intended to show a strict correlation but rather a comparison. 



