434 CHARLES S. PROSSER 



ago. Mr. Schoepfle, however, stated that the first one opened on 

 the Soldiers' Home grounds was the one on Hancock Street in 1877. 



LAKE SHORE AND MICHIGAN SOUTHERN RAILROAD QUARRY 



So far as known to the writer, none of the quarries in Sandusky or 

 its immediate vicinity affords an excellent continuous section of the 

 Columbus and its overlying limestone. Such an exposure of their 

 contact, however, is to be found in the Lake Shore & Michigan 

 Southern Railroad quarry, two and three-quarters miles southwest 

 of the Lake Shore station in Sandusky, and two and one-half miles 

 northeast of Castalia, in Margaretta Township; and for this reason 

 it will be first described. According to Mr. Wagner, it was worked 

 as much as twenty-five years ago, and my attention was first called 

 to it by Dr. Charles K. Swartz, of Johns Hopkins University, who 

 stated that the contact of the Columbus and Delaware limestones 

 was to be seen in its western part. The upper part of the following 

 section was obtained near the western end of the southern wall of 

 the quarry, and the lower portion near its angle in direction : 



Thickness Total Thick- 

 No. (Feet) ness (Feet) 



10. Brownish-gray limestone, which contains fossils as 1+ ig\ 



Leptcena rhomboidalis (Wilckens) and Glyptodesma 



erectum Hall. 

 9. Chert zone. J 18J 



8. Brownish-gray limestone, but not encrinal, in which § 18 1\ 



Leptcena rhomboidalis (Wilckens), Choneles mucron- 



atus Hall, Glyptodesma erectum Hall, and Grammysia 



bisulcata (Con.) were found. 

 7. Chert zone. \ 17J 



6. Crinoidal limestone of brownish-gray color, which 4f 17 J 



separates into several layers. Leptcena rhomboidalis 



(Wilckens) occurs, but the zone does not contain many 



fossils, with the exception of the Crinoid segments, 



which form an appreciable part of the rock. Shale 



parting at the base. 

 5. Compact massive limestone, with crinoidal band near if 12^ 



its center; but in other parts of the quarry the entire 



zone is more of an encrinal limestone. The thickness 



varies from 1 foot 9 inches to 1 foot 10 inches. 



