THE SHENANDOAH LIMESTONE 659 



numerous localities in New York. In the western part of the 

 cut are some rather thin, blackish, argillaceous shales. 



In the southern part of Martinsburg, operated by the Mary- 

 land Limestone Quarry Company, are extensive quarries in the 

 massive Shenandoah limestone, large quantities of which are 



Fig. 2. — Transition from Shenandoah limestone to Martinsburg shale in switch 

 cut on B. & O. R. R. east of Martinsburg, W. Va. The men are standing opposite 

 the upper part of the Shenandoah limestone and the Martinsburg shale is to the right. 



shipped to the steel and other furnaces in the vicinity of Pitts- 

 burg. The limestone is mainly a light colored drab and this 

 part is reported as the purest and best for flux. No fossils were 

 found in the limited time given to the search and one of the 

 quarrymen said he had never noticed 'any. 



Exposures ?iear Pinesburg, Md. — A number of the exposures 

 in the vicinity of Pinesburg station on the Western Maryland 



