186 C. R. KEYES — A DEPOSITIONAL MEASURE OF UNCONFORMITY 



indicate a similar position, although there the plant horizons are within 

 100 feet of the Mississippian series. 



Table of Terranes in Western Interior Coal Field 





General. 



Missouri-Kan- 

 sas. 



Indian terri- 

 tory. 



Arkansas. 





Oklahoman series. 











MiSSOURIAN SERIES . . . - 



Cottonwood. 



Atchison. 



Forbes. 



Platte. 



Plattsmouth. 



Lawrence. 



Stanton. 



Parkville. 



lola. 



Thayer. 



Bethany. 







CO 



C 



3 



Poteau. 



Wanting. 



o 



6 



r 



Des Moines series. . . -j 



I 



Marais des Cyg- 



nes. 

 Henrietta. 

 Cherokee. 



Cavaniol. 



Poteau. 





Arkansan series .... I 



I 



(Hiatus.) 



Sebastian. 

 ? 



9 



Booneville. 



9 



Sebastian. 



Spadra. 



Norristown. 



Booneville. 



Appleton. 



Danville. 



Millstone grit. 





r 



1 

 MissrssiPPiAN series. . ■{ 



1 



I 



Kaskaskia. 

 Saint Louis. 

 Augusta. 

 Chouteau. 



Boston group, 

 Boone. 



o 



Boston group. 



Boone. 

 Saint Joe. 



RELATIONS TO TEXAS SECTION 



The close approximation in the equivalenc}' of the Coal Measures of 

 Missouri and Kansas and tliose of Arkansas and Indian territory en- 

 ables the Texas Carboniferous to he more clearl}'' understood. As yet, the 

 Coal Measures of Texas are only provisionally subdivided. However, 

 the Cisco and Can3'on divisions of Cummins* appear to very nearly 

 represent the Missourian series of the more northern region. 



♦Texas Geol. Survey, Second Ann. Rept., 1891, p. 361. 



