1897.J DRAKE — THE GEOLOGY OF IXDIAX TERRITORY. 359 



fep:t. 

 Clay shale which contains some fossiliferous shaly 



limestone near the base lo 



Friable arenaceous fossiliferous limestone 2 



Calcareous, fossiliferous, yellowish clays 10 



Hard, rough-surfaced, highly fossiliferous lime- 

 stone 3 



Bluish clay shale 25 



Limestone i 



51 



Clay shale (Fayetteville shale ?) at base 



Fossils of a decided Coal Measures facies were collected from 

 some black clay shale at a place on the M. K. & T. Railway, about 

 four miles north of Vinita. This shale is not more than one 

 hundred and fifty feet above the Boone limestone, so the strata 

 referable to the Boston group, at this place, is probably not more 

 than twenty-five or fifty feet thick. 



Between Fairland and Miami the strata that may be referred to 

 this group are gray shales and possibly a little limestone. North- 

 east of Miami it seems probable that the horizon of the Boston 

 group is overlapped by Coal Measures shales and sandstones, or if 

 this is not the case the group is represented by gray clay shales and 

 some sandstone. 



The sections of the Boston group show that it is thicker and ap- 

 parently has higher beds in the southwestern part of the Lower 

 Carboniferous area where the strata are exposed by being folded or 

 excessively eroded. The same sandstone or grit bed appears to 

 overlie unconformably these different Lower Carboniferous beds at 

 various places. The sandstone beds lying on the Boston group 

 one and a half miles south of Vinita are apparently the same sand- 

 stones that rest on the Boone limestone, some six or seven miles 

 southeast of Vinita. Two or three miles southwest from the mouth 

 of Pryor creek a conglomerate sandstone overlies the Boston 

 group to the westward and the Boone limestone to the eastward. 

 The gradual upward change in the Lower Carboniferous deposits 

 from massive and extensive cherts and limestones to shales, 

 arenaceous limestones and sandstones indicate an upward move- 

 ment of the ocean bottom. This movement may have continued 



