rts of the western interior coalfield. 

 en in feet.] 



1 field. 



lier, A. J.,andothers, BuU.U. S. 

 3ol. Survey No. 326, 1907, p. 12. 



vanna formation. Feet. 



ris shale 700 



rt Smith formation 400 



adra shale 350-500 



irtshorne coal. 



irtshorne sandstone 100-300 



oka formation 1,500-5,000 



"Indian Territory coal field" 

 (Drake, N. F., Proc. Am. Philos. 

 Soc, vol. 36, 1897, pp. 388-407). 



Feet. 

 Poteaugroup 2,000 



Cavaniol group 5,500 



Grady coal. 



Lower Coal Measures 17,000 



Southern Oklahoma. 



Taff, J. A., Coalgate foho (No. 74), Geol. 

 Atlas U. S., 1901. 



Feet. 



Seminole conglomerate 50+ 



Holdenville shale 260 



Wewoka formation 700 



Wetumka shale 120 



Calvin sandstone 145-240 



Senora formation 140-485 



Stuart shale 90-280 



Thurman sandstone 80-260 



Boggy shale 2,000-2,600 



Savanna sandstone 1 ,000 



McAUster shale 1 ,800, 2,000 



Aioka coal, probably Hartshorns coal. 



Hartshorne sandstone 150 



Atoka formation 3,100 



Wapanucka limestone 100 



Caney shale (Carboniferous and 



probably Devonian) 800+ 



Taff, J. A., Atoka foho (No. 79), 

 Geol. Atlas U. S., 1902. 



Feet. 

 Boggy shale 800+ 



Savanna sandstone 750-1 , 100 



McAlester shale 1,150-1,500 



Atoka coal, at same horizon as 

 Hartshorne coal. 



Hartshorne sandstone 150-200 



Atoka formation 3,200 



Wapanucka limestone . . . 100-150 

 Caney shale 1, 500 



Woodford chert (Devonian and 

 Carboniferous). 



Taff, J. A., Tishomingo folio (No. 

 98), Geol. Atlas IT'S., 1903. 



Franks conglomerate. . . 300-500+ 

 Unconformity 



-Glenn formation 1,000-3,000- 



Caney shale . . 1,500 



Sycamore limestone 0-160 



Woodford chert (Devonian and 

 Carboniferous). 



Arbuckle Mountains, Oklahoma (Taff, J. 

 A., Prof. Paper U. S. Geol. Survey, No. 

 31, 1904, pp. 34-35). 



Feet. 

 Sandstone, shale, and coal. 10,000-11,000 



Wapanucka limestone. 

 Franks conglomerate. 



-Unconformity- 



Caney shale. 



Woodford chert. 



Western Arkansas (Purdue, A. 

 H., The slates of Arkansas; 

 Bull. Geol. Survey Arkan- 

 sas, 1909, p. 48). 



Atoka sandstone 6,000 



Jackfork sandstone 6,600 



Stanley shale. 



-Unconformity" 



Abbreviated Kansas section 

 (Haworth, E., and others, 

 Kansas University, Geol. Sur- 

 vey, vol. 3, 1898, p. 94). 



Cottonwood formation. 

 Wabaunsee formation. 

 Shawnee formation. 

 Douglas formation. 

 Pottawatomie formation. 

 Marmaton formation. 



Cherokee shales. 



Boone chert. 



innsylvanian and Mississippian as given in the reports cited. 



