494 The Upper Devonian Deposits of Maryland 



Tlie Liorhynclius glohuliformc zone of the Ithaca fauna is well ex- 

 posed at tliis locality and abounds in fossils. Especially noteworthy are 

 the abundance and size of ScMzophoria striaiula which is associated with 

 Spirifer mucronatns var. posterns, and other diagnostic species of the 

 Ithaca fauna. 



The upper conglomerate of the Parkhead member contains a great 

 profusion of fossils. A conspicuous feature is a red band of Catskill 

 type that appears in the Chemung a considerable distance below the base 

 of the Catskill and is overlain by sediments of Jennings type carrying 

 marine fossils. The upper Chemung conglomerate is unusually thick 

 and massive at this place. 



A number of excellent sections of the Jennings are exposed on the 

 west slope of Green Ridge, three of which will be described. 



XIY. Section at Town Creek ' 

 The section is seen in the cuts of the Western Maryland Eailroad near 

 the mouth of Town Creek, west of Town Creek station. It begins at the 

 Eomney-Jennings contact 6315 feet west of the west end of the bridge 

 over Town Creek and extends eastward 7740 feet. This is the finest ex- 

 posure of the entire Jennings observed in Maryland and was accordingly 

 examined with unusual care. 



Red sandstone and shale. 



Catskill FoiniATiON 



Jennings Foemation 



! '^ w , 





= .- °- "-13 g 



-^ = o ° a, <= a 



Chemung Member "Eitc S ^s^ 



5 C" "^ 



; c c 



H^bt~.S 



Railroad N. 42° E. 



.Jennings-Catskill contact 7746 4769 



Green and red shale. Dip 38° E. At top occur Atrypa 

 spinosa, Cryptonella cf. eudora. Douvillina cwyuta, Schueh- 

 ertella chemungensis. Schizophoria striatula var. mary- 

 landica, Spirifer disjunctus abundant, Holopca 1 sp., cf. 



Orammysia undata 7746 53 4769 



Green and brown shale and bands of sandstone. At top 

 occur Camarotachia eximia, Cryptonella cf. eudora abun- 

 dant, Spirifer disjunctus abundant, Leptodesma sp 7636 57.3 4716 



' Measured by tape. 



