MARYLAND GEOLOGICAL SURVEY 



LOWER DEVONIAN, PLATE 



-VIEW SHOWING THE KEYSEK MEMKKK (JK THE HELDERBERG FORMATION AT 

 KEYSER, W. VA. 







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Fig. 2. — VIEW showing the contact of the keyser member of the helderbf.rg witi 



THE TONOLGWAY LIMESTONE AT KEYSER, W. VA. 



