Maryland Geological Survey 507 



The recurrence of the Tropidoleptus carinatus fauna at the horizon of 

 the lower Chemung conglomerate, as sliown by the presence of Spirifer 

 maraji var. superstes 2690 feet above the base of the Jennings, is of 

 especial interest. The red bed in the upper part of the Chemung is seen 

 on the east side of the ridge, where it is overlain by strata containing 

 many marine fossils. 



Two fine sections are exposed on the west slope of Polish Mountain, 

 one on the National Road and one on the Williams Road east of Rush. 

 Both extend from the base of the Jennings to the upper Chemung con- 

 glomerate, which is found near the top of the mountain. Wliile the 

 lower Chemung conglomerate could not be identified with certainty, it 

 is well displayed in many localities east of Polish Mountain where it 

 contains the recurrent Tropidoleptus carinatus fauna. 



XVII. Section on Williams Road, Polish Mountain^ 

 This section begins at the Romney-Jennings contact, approximately 

 200 feet west of the sharp turn in the road west of Town Creek, and ex- 

 tends to the cross roads on the top of the mountain. 



n3-^ ^ ^ o c 



"a S =■" S ° ' S 



Jennings Formation c-stjio = ■^•3!2 



.a g-;: „ — .t:-° (n 



Chemung Sandstone Member o g.g §'2 ^ -.„5 



S -2 hex: .^ ^ < o i2 



Cross roads at top of mountain. Altitude by barometer 



1450. Map altitude 1480 10460 3456.5 



Road S. 65° E. 



Concealed 10460 23 3456.5 



Green shale breaking irregularly. Massive coarse con- 

 glomerate at top 10400 27 3433.5 



Road S. 35° E. 



Arenaceous shale breaking irregularly. Dip 20° E 10330 31.5 3406.5 



Concealed 10230 31.5 3375 



* Measured by pacing. 



