8o THE PERMO-CARBONIFEROUS RED BEDS OF 



where Coal VI is seen immediately underlying the sandstone. On the west the ex- 

 tension of this vtpper sandstone can be traced some distance, though poorly exposed 

 for the first 150 yards, and there, too, it immediately overlies CoaLVI. The age of 

 the sandstone is thus put as late as the age of the horizon of Coal VI. Farther 

 south there is commonly met with a nonconformability a little above Coal VI, and 

 accompanying measures are often cut out and replaced by sandstone. The erosion 

 is both of the channel and broad-wash order, the channels having been noted as 

 much as 16 feet deep. It, however, seldom does more than remove the top of the 

 coal, and not a single instance is recalled of its having cut through and below the 

 coal. There is, thus, some evidence suggesting that the sandstone at Coxville be- 

 longs to the period of Division VI, but there is also some evidence that it belongs to 

 a much later period. If, as has been suggested, this is a i^art of the same channel, or 

 system of channels, as at Silver Island, Rockport, Mecca, and other places to be men- 

 tioned, it has cut channels 150 feet or more deep, extending almost, if not quite, 

 through the measures. Such channels require some time for their cutting, and it 

 would seem as though, if this took place during the time period of Division VI, there 

 should be more general evidence of a marked conformity than there is. The assump- 

 tion of an unusually large uplift in the northeastern part of the coal field during that 

 period might in part explain its absence elsewhere. For the present the cjviestion 

 must remain an open one. The course of this channel was not discovered, but it 

 appeared to cross the creek near Coxville, and go west, or south of west, coming from 

 the north." 



"Coal Measure on Sugar Creeks — -The coals in this district are comprised in 

 sections 23-26, 35, 36. 



"The coal in this district is very irregular, due apparently to this being in the 

 path of the old Coxville Carboniferous River, met with at Silverwood. Not enough 

 detailed work was done to settle this question definitely, but from what was noted 

 we were led to surmise that the old river-channel crossed Sugar Creek at Rockport. 

 The resemblance of the sandstone filling to the Mansfield sandstone exposed both 

 up and down the creek, and the failure to find just the data needed, render this 

 opinion somewhat doubtful. There are, however, some outside data that tend to 

 confirm that theory; principally, that this old filled channel is plainly exposed at 

 Silverwood, and the appearance of certain sandstones in section 5 of this township 

 indicates that the channel was not very far away. Evidences of it are next met to 

 the south along the middle course of Roaring Creek, and in the region of Sand Creek. 

 Rockport is in the line between these places, and is, moreover, the only place along 

 Sugar Creek where such a crossing appears to have taken place." 



OHIO. 



In eastern Ohio and Kentucky and in western West Virginia and Penn- 

 sylvania the middle Conemaugh beds resemble in many characters the Red 

 Beds of Texas and Nevi^ Mexico, and in both Ohio and Pennsylvania remains 

 of reptiles and amphibians have been reported. In Pennsylvania the remains 

 have been shown to be very similar to those found in Texas and Illinois; in 

 Ohio very primitive forms, Eosaiiravus copei Williston, have been found at 

 Linton, with numerous Amphibia, and other as yet undescribed forms have 

 been found in other horizons. 



" Blatchley and Ashley, 23d Annual Report State Geologist Indiana, p. 345. 



