438 CHARLES S. PROSSER 



quarry. A heavy storm, however, prevented the writer from deter- 

 mining this point, and perhaps the rather crinoidal limestone at the 

 top of the Schoepfie quarry represents the lower part of the crinoidal 

 limestone overlying the bone-bed. This latter view is the opinion 

 of Dr. Swartz, who gives the total thickness of the strata in the Schoep- 

 fie quarry as nineteen feet. 1 In the next pit, a short distance to the 

 southwest and nearer the railroad track, succeeding the layer contain- 

 ing the bone-bed is a massive, very crinoidal limestone, which on 

 fresh fracture is brownish-gray to bluish-gray, but weathers on the 

 exposed surface to a light gray color. There is shown above the bone- 

 bed at least three feet of this crinoidal limestone when a layer of chert 

 appears, and in part of the ledge six inches higher is another chert 

 layer. Mr. Schoepfie also stated that, in working for other parties 

 to the southwest of his quarry and west of Hancock Street, he found 

 a considerable quantity of chert in the rock above the horizon of his 

 quarry. Above the crinoidal zone the rock is thin-bedded to shaly, 

 and Lepkcna rhomboidalis (Wilckens) is abundant. This crinoidal 

 zone apparently corresponds stratigraphically to the similar one noted 

 in the Lake Shore & Michigan Southern Railroad quarry between 

 Nos. 3 and 7 of that section. 



To the south of the Carr & Craig quarry, between the two rail- 

 road tracks, is another old and abandoned quarry. The dip, however, 

 is reversed, and the Schoepfie quarry limestone appears in this exca- 

 vation with the bone-bed apparently at the top of the southern wall. 



Still farther south, on Pipe Creek, by the northern side of the 

 cemetery, is bluish-gray limestone, some of which is quite massive, 

 which also belongs in the same division as that of the Schoepfie quarry. 

 There is a heavy dip down- stream to the east at this locality, and the 

 massive limestone is exposed up the creek well toward the western 

 line of the Lake Shore Electric Railroad. 



To the south of Sandusky, and about one-fourth mile south of 

 the Soldiers' Home, is the quarry of the Wagner Stone Co. About 

 eleven feet of rock is shown in this quarry, the upper three feet of 

 which splits into thin layers from one and one-half to four inches in 

 thickness, although not very even. The rocks of this portion are 

 brownish-gray in color, and weather to a light gray or buff color. 



1 Letter of February 4, 1905. 



