Maryland Geological Survey 377 



In the first cut on the Georges Creek and Cumberland Kailroad west of 

 the Winchester Road station are greenish shales belonging in the Wood- 

 mont member of the Jennings formation. East of this cut the inter- 

 mediate rocks between the Woodmont member of the Jennings and the 

 Marcellus shales at the base of the Eomney formation are largely con- 

 cealed. No fossils were found by the writer in the shales of this first rail- 

 road cut. 



In two or three of the following cuts, to the west, are some red shales; 

 but a considerable part of the rock is a friable, mealy sandstone with red 

 streaks and blotches in which fossils are quite rare. These sandstones 

 alternate with greenish to olive shales which are very argillaceous and 

 similar in lithological appearance to those of the first cut. 



Another cut in the upper part of the Jennings formation shows bands 

 of red shales, of considerable thickness, in its western part and loose 

 blocks of conglomerate occur which probably came from a stratum near 

 this horizon. The other rocks are mainly olive clay shales and thin bedded 

 sandstones, some of the latter being rather coarse grained, friable, and 

 buff to yellowish in color. In the somewhat mealy sandstones the writer 

 found occasionally poorly preserved fossils as, for example, Spirifer, Camar- 

 rotoechia, and pelecypods. These fossils occur both above and below the 

 red shales. In some of the olive shales are a few specimens of pelecypods. 



Near the western end of the trestle the rocks are considered to belong 

 in the Catskill formation which continues to the vicinity of the east- 

 ern end of the longer tunnel where the base of the Pocono sandstone 

 is reached. There are covered intervals so that the entire thickness of the 

 Catskill formation is not shown, still this railroad affords a good 

 locality for becoming acquainted with the rocks composing it. 



Exposures in Garreti County. 



Exposure in Savage River Valley. — The valley of Savage River was 

 examined for some miles north of the mouth of Crabtree Creek ; but it is 

 not a very favorable locality for the study of the Jennings formation. For 

 some distance above the mouth of the creek the rocks are mostly concealed, 

 except on the eastern steep bank of the river. About one-third of a mile 

 above the mouth of Bear Pen Run are grayish to greenish-gray arenaceous 



