Maryland Geological Survey 519 



head member, a form found abundantly in the western sections, but occur- 

 ring less frequently in the east. 



A number of excellent exposures of the Jennino's are to be seen in the 

 Cumberland syncline, south of the Potomac Kiver in West Virginia. The 

 best of these are along Bocky Eun on the Baltimore and Ohio Eailroad 

 cut-off, and on Turners Eun Eoad east of Ivnobly, seven miles southwest 

 of Cumberland. At the former locality at the base of the Parkhead occur 

 Chonetes scituhis, Cyrtina Iminilionensis, RliipidomeUa vanuxerni, Schizo- 

 plioria striatiila, Spirifer maraji var. swpcrstes abundant, Tropidoleptus 

 carinalus, Cyclonemina mulUsiriata, Pleurotomaria (Gyroina) capil- 

 laria ? At the same horizon at the latter locality occur Chonetes scitulus, 

 Spirifer marcyi var. superstes, Spirifer (Delthyris) mesacosialis. 



Sections West of ^Yills Mountain 



The sections of the Jennings exj^osed west of Wills Mountain differ 

 both lithologically and faunally from those east of Wills Mountain. 

 Among the conspicuous differences observed are the lesser thickness of 

 the formation, the larger development of shale in the lower beds, render- 

 ing the Parkhead member scarcely distinct, the occurrence of conglomer- 

 ates in the middle of the Chemung, and the absence of the red band so 

 prominent in the upper part of the Chemung in many of the eastern 

 sections. 



The sections are exposed in two areas, the Keyser area and the Oak- 

 land anticline. The sections in the Keyser area will be considered in the 

 order of their location from the northeast to the southwest. 



XXI. Section at Ellerslie, Pennsylvania ^ 

 The lower Jennings is exposed in a ravine north of and parallel to the 

 tramway from Ellerslie to the fire-clay mine on Little Allegany Mountain. 

 The section begins at the Eomney-Jennings contact and extends westward 

 1911 feet. 



' Measured by pacing. 



