463 



The Upper Devonian Deposits of Maryland 



to 1000 feet ve'vti rally) and is a liorizon of importance for correlation 

 with the 'New York section. The Liorhynchus glohvliforme zone is well 

 fleveloped above this (1000 to IGOO feet vertically). The conglomerate 

 at the base of the Parkhead is finely exposed and abounds in Camarota- 

 cJiia congregata var. parhheadensis. It is underlain by a red bed which 

 suggests the Catskill lithologically, and shows that Catskill conditions had 

 probably already begun in some adjacent area. The Parkhead contains 

 three conglomeratic zones, above which the bods consist more largely of 

 shale. These are in turn overlain by more arenaceous beds of the Che- 

 mung seen on the west bank of Great Tonoloway Creek east of the turn 

 of the road, in which the Spirifer disjunctus fauna makes its appearance. 



v. Section on Hancock-Harrisonville Road ' 

 This section is exposed on the Hancock-Harrisonville road, which leads 

 eastward from Cove Eidge, not quite one-half mile north of the Maryland- 

 Pennsylvania State line. It is located in Fulton County, Pa., about 2 

 miles northeast of Hancock. The section begins at the Romney-Jennings 

 contact and extends eastward 1505 feet. It affords a good exposure of the 

 lower strata of the Jennings. 



Jennings Formation . . , 



Woodniont Shale Member ^e-o 



"b O °-" 



BEDS CONTAINING ITHACA FAUNA §■" cS 



Road N. 85° E. Ig^ll 



Ravine 1505 



Shale breaking into irregular fragments 1505 



Fissile olive-green shale 1385 



Hackly olive-green shale, containing at the top Atrypa 



reticularis 1345 



Coarse olive-green shale breaking irregularly, containing 

 at the top Atrypa reticularis abundant, Productella spec- 

 iosa, Pugnax pugnus var. alius, Schizophoria striatula, 



Spirifer mucronatus var. posterns. N. 17° E. 60° E 1280 



Green shale fissile at bottom, breaking irregularly at 

 top. Thin beds of sandstone N. 22° E. 55° E., containing 

 at the top Atrypa reticularis abundant, Productella spec- 

 iosa abundant, Pugnax pugnus var. altus, Schizophoria 

 striatula, Spirifer mucronatus var. posterus, Stropheodonta 

 demissa, Leptostrophia interstrialis 1213 



* Measured by pacing. 





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29.1 



1017 



43.2 



62 



988 



944 



156.7 882 



