Maryland Geological Survey 365 



No. 0. A little above the sixth turn are olive shales in which an 

 occasional fossil, as Amhocoelia umbonaia (Conrad) occurs, while a little 

 higher in some rather lumpy shales are quite a few fossils as Spirifer dis- 

 junctus Sowerby, Spirifer mesacosialis Hall, ProduclcUa laclirymosa 

 (Conrad), and peleeypods. These rocks are mostly green to olive 

 shales with thin bands of arenaceous shale or sandstone. There is not 

 much variation in the lithological appearance of the rocks, and fossils 

 occur only in occasional layers. 



No. 10. Between the seventh and eighth turns on the road, about 

 opposite a spring which occurs in a run on the lower side, are somewhat 

 coarser layers, and on thin sandstones are excellent specimens of Camor 

 rotoechia contracta Hall associated with specimens of Spirifer mesa- 

 cosialis Hall. The rocks above at the eighth turn are vei-y argillaceous 

 olive shales which break into pencil shales. 



No. 11. Just below the ninth turn, in thin sandstone layers are 

 numerous specimens of Amhocoelia umhonata (Conrad) and Spirifer dis- 

 junctus Sowerby together with several other species. The rocks are com- 

 posed of thin sandstones which alternate with the shales and are about 

 the same in general appearance as the fossiliferous layers in the Chemung 

 of southern ^N'ew York. 



No. 12. Near the top of the mountain the shales weather to quite 

 a brownish or rusty color. In some of the layers of thin sandstone a 

 broad fonn of Spirifer disjunctus Sowerby occurs. Quartz crystals were 

 found in a piece of shale while very near the summit of the mountain 

 are layers of thin bedded, rather bluish sandstone with a dip of 15° to 

 17° E. Loose pieces of conglomerate and grit occur on the side of the 

 mountain near its top and on the crest. All of the pieces found were 

 loose and the conglomerate was not seen in place, although it undoubtedly 

 capped the mountain originally. 



In small runs to the south of the National Eoad are the greenish 

 shales and sandstones of the Chemung and no indication of a conglomerate 

 ledge was seen. The blocks are not numerous and it is probable that 

 their horizon, stratigraphically, is considerably above the highest ex- 

 posures on the National Road. Some of the blocks on the joint planes 



