Maryland Geological Survey 81 



Total 



Thick- thick- 



noss. ness. 



very fossiliferous and contain numerous specimens of Spirifer 

 mucronatus (Conrad) and Tropidoleptus carinatus (Conrad) while 

 other species are common. It is a typical Hamilton fauna as will 

 be seen from the following list: Chonetes mucronatus Hall, 

 Chonetes coronatus (Conrad), Chonetes setiger (Hall), Spirifer 

 mAicronatus (Conrad), Prothyris lanceolata Hall, Paracyclas lirata 

 Conrad, Diaphorostoma lineatum (?) Conrad, Coleolus cf. tenui- 

 cinctus Hall, Orthoceras debryx ( ?) Hall 505 1594 



No. 6. This zone consists of a massive, grayish to slightly 

 greenish-gray sandstone which breaks into quite large, irregular 

 blocks and dips at an angle of 70°. Fossils are very rare in this 

 sandstone; but specimens of Spirifer were found by Dr. Rowe 59 1653 



This sandstone appears to the writer to represent the one which 

 occurs at numerous other localities in the upper part of the Rom- 

 ney formation and the top of the sandstone is regarded as 

 marking the upper limit of the Romney in this section. If this 

 be true then the Romney formation has an approximate thickness 

 of 1653 feet in the western part of Washington County which 

 agrees closely with its thickness in Allegany County, 1590 feet, 

 at Gilpin. 



No. 7. The remaining part of the section consists of thin, 

 greenish shales alternating with thin bedded sandstones. The dips 

 vary from 70° to 83° and the average of a number of readings is 

 75°. Succeeding the massive sandstone at the top of the Romney 

 formation are thin greenish shales and there is no representation 

 of the black Genesee shale. The layers of sandstone are thin, 

 still there is a great deal of sandstone and it, possibly, forms 

 nearly one-half of the thickness of the rocks. This zone is in the 

 Jennings formation and, probably, all of it belongs in the Wood- 

 mont member 1257 2910 



Exposures near Hancocl-. — The Romney is exposed on the National 

 Eoad just east of Hancock. The following descriptions of the various 

 zones of the section beginning with ISTo. 1, at the top of the Romney, are 

 from Dr. Rowe's notes : 



Total 

 Thick- thick- 

 ness, ness. 

 No. 1. Cross and thin bedded light olive sandstone with little 



or no shale. Average dip 48°. Strike N. 25° E. Sandstone zone 



at the top of the Romney formation 55A 388 



No. 2. Layer with numerous specimens of Camarotoechia i 332^ 



No. 3. Cross and thin bedded light olive sandstone with little 



or no shale 72 332 



6 



