White.] 482 [Oct, 20, 



The section of Xo. XII, obtained at this locality, is quite interesting 

 from the fact that it reveals this series much thinner than it had always 

 been estimated on Cheat river. Owing to the difficulty of finding ex- 

 posures at the immediate base of No. XII, much of the underlying mas- 

 sive rock in the Mauch Chunk shales has heretofore been included in 

 No. XII on Clieat river, thus giving it a thickness of 300'-350'. The 

 above section shows the true base of No. XII in an unmistakable manner, 

 and shows that this series has a thickness of only 180' at the locality in 

 question. 



The uppermost member. No. I, which corresponds to the Ilomeicood SS. 

 of the Penna. Survey reports, is a very massive, grayish-whiterock, mak- 

 ing a bold clifl around the mountain side, 20 to 30 yards back from No. 3, 

 from which it is separated by a concealed interval of 40' at this locality. 

 This No. 2 is probably a shale or flaggy sandstone interval and may possi- 

 bly contain a small coal bed, since the Mercer series of Penna. is due in 

 this horizon. 



No. 3 is the conglomerate portion of No. XII and is seen in one im- 

 mense overhanging cliff along the right bank of Quarry run. It is a 

 grayish-white rock, often exhibiting a bufflsh tinge, and contains many 

 quartz pebbles scattered in layers throughout its mass, being largest and 

 most numerous in the uppermost 25'. None were seen larger than chest- 

 nuts. 



This stratum would seem to harmonize with the Upper Oonnoquenessing 

 sandstone of the Conglomerate series in western Pennsylvania. It is the 

 great cliff rock along the Cheat river cafion. 



Immediately below this last stratum, there comes a very interesting 

 little bed of coal which is quite persistent for many miles along Cheat river, 

 being generally separated into two layers by a thin sandstone or shale as 

 shown in the section, and always underlain by a thick bed of black, fissile 

 slate. The bed is fully exposed for a distance of 200 yards at the base of 

 the great cliS along Quarry run, and its variations are there beautifully 

 shown. Occasionally the sandstone comes down and cuts it out entirely 

 for a few feet, but it suddenly comes in again at the same horizon. It 

 never gets thicker than 2' and seems to be quite pure, simulating the 

 "block" coals in physical aspect. Since it appears to come at the same 

 geological horizon as the Quakertoim coal of Lawrence Co., Pennsylvania. 

 I have doubtfully referred it to that bed. 



A diligent search was made in the Uack shale, No. 5, for fossil plants, 

 but as yet none have been found except some macerated fragments of 

 Cordaites. 



Nos. 6-8 seem to represent the Loicer Gornnoquenessing SS. of Penna. ; 

 the older, Sharon conglomerate, being in my opinion unrepresented in the 

 section. 



In passing from No. XII to the rocks of XI, there is a wonderful change 

 in the lithology of the rocks, the massive, coarse, grayish white beds of 



