4:74 The Upper Devoxiax Deposits of Marylaxd 



ROJI.XEY FORIIATIOX 



Massive sandstone. N. 25° E. 55° W. 



The Liorhynchvs glohulifornie zone of the Ithaca fauna is well exposed 

 and is overlain by a conglomerate containing Camarotcecliia congregata 

 var. parhlieadensis in profusion. The strata are evidently the same as 

 those seen at Tonoloway. The occurrence of the LiorliyncJius mesacosiale 

 zone, shown by the presence of Leptodesma naviforme at the base of the 

 Parkhead, is of interest as it can be traced westward in a similar position 

 as far as Allegany Grove. 



IX. Section Near Mann, Pennsylvania ^ 

 This section is exposed along the road leading northwest from Little 

 Tonoloway Creek near the Pennsylvania-Maryland State line through 

 Mann, to Black Oak Eidge in Bethel Township, Fulton County, Pa. 

 While the lower strata are largely concealed, the section is of importance 

 because it extends from the base of the Jennings to the Catskill and 

 permits an estimate of the thickness of the Jennings in this area. 



CATSKrLL Formation 

 Red sandstone and shale. 



Jennings Formation 



Chemung Sandstone Member 



Road S. 25° E 



■3io5 

 c— too 



■p o c ^ m 



o = 5 -V 



-?ri 



27.8 



4391 



10.4 



4363 



8.3 



4353 



13.9 



4344 



Jennings-Catsklll contact 5280 4391 



Fissile argillaceous greenish-yellow shale and some 



speckled red sandstone 5280 



Reddish-brown somewhat hackly shale 5240 



Thin-bedded grayish-brown sandstone 5225 



Argillaceous yellowish-green sandstone and shale 5213 



Road S. 90° E. 



Splintery red shale breaking irregularly, some green 



splintery shale 5193 46.4 4330 



Yellow-green sandstone 5143 1 4285 



Interbedded yellowish-green and red argillaceous shale, 

 some thin beds greenish-yellow sandstone. A heavier bed 

 of yellowish-green sandstone at bottom 5142 46.4 4284 



' Measured by pacing. 



