358 The Upper Devonian Deposits of Maryland 



No. 3. Abo\e the sandstones are buff to olive shales in which are 

 fossils as ProducteUa and Schizophoria striatula (Schlot.), and brownish 

 argillaceous shales interstratified with the olive ones. Toward the upper 

 part of this zone there are some quite massive sandstones at the base of 

 which is one 4 feet thick, then shales occur capped by another sandstone 

 10 feet in thickness. Next there is a band of mostly red argillaceous 

 shale containing some reddish compact sandstone the layers of which vary 

 in thickness from 6 inches to 1 foot. Near the top is a stratum of olive 

 blocky shale. 



No. If. Succeeding the belt of red shale is a fairly massive sand- 

 stone followed by buff argillaceous and very compact shale which splits 

 into quite thick layers. These are much stained with bright red blotches 

 on the weathered surfaces. Farther up the road are thin bedded, olive, 

 argillaceous shales which form the greater part of this zone and extend 

 to the school-house. No fossils were found by the writer but a few 

 specimens were reported by Eowe. From numbers 2-4 of this section 

 Clarke has identified the following species : Atrypa hystrix Hall, Cyrtina 

 hamiltonensis Hall, 8 cMzoplioria striatula (Schlot.), Spirifer marcyi var. 

 superstes Clarke, Spiiifcr mucronatus var. posterns Hall and Clarke, 

 Bellerophon nactoides Clarke. 



No. 5. The shales of this zone are mostly buff in color but they are 

 not well shown along the road. Some distance above the school-house 

 there are reddish fissile shales which are not very thick. The Upper 

 Chemung is covered along the National Eoad so that the transition from 

 the Jennings to the Catskill formation is not shown. From collections 

 made by Eowe in the vicinity of the school-house mentioned above, Clarke 

 has identified the following species : Leptodesma naviforme Hall, 

 Liopteiia bigshyi Hall, Nucula cf. corhulifonnis Hall. 



No. 6. The Catskill formation is well shown by the side of the 

 road just west of the church and is composed of red shale and sandstones 

 with some layers of gi-eenish sandstone. From the church well toward 

 the top of Sideling Hill are numerous exposures of red argillaceous shales 

 and red sandstones as well as some greenish-gray, massive sandstones and 

 greenish shales all belonging in the Catskill formation, while the hill 

 is capped by Pocono sandstone. 



