1008 



NEW YORK STATE MUSEUM 



1Q 



IV 



JIS 



Long Beards Qastile. 

 sandstone 



Wiscoy light 

 and dark 

 shales 



Portage 

 sandstones 



Gardeau 

 flags with 

 shale 



They are exposed near the- reser- 

 voir on Quarry hill 1 mile south of Xunda, 

 and a thin seam contains comminuted 

 crinoids and brachiopod shells. 



In the Dansville and Naples sections 

 these beds contain an abundant Chemung 

 fauna. 



There is a small exposure of the sand- 

 stones on the west side of the valley iy 2 

 miles south of Portageville, and the com- 

 pact upper layers are quarried by the 

 Genesee Blue Stone Co. 1 mile farther 

 south. 



The contact line between the sandstones 

 and the succeeding formation is covered 

 by drift in the immediate vicinity of the 

 river, but a bed of black shales is exposed 

 at Hunts Station on the east and 2 miles 

 west from the high Portage bridge and 

 along Wolf creek near Hopkins mill at 

 Castile, the position of which is such as to 

 show that the section exposed at Portage- 

 ville practically includes all of the " Port- 

 age sandstones." 



Wiscoy shales. The fossiliferous layers 

 are exposed in the north bank of the 

 ravine of Wiscoy creek y± mile above the 

 Rhinestreet village of Wiscoy, and below it are 137 



black shale 



feet of strata, many layers of which are 

 black shales and others are soft/ light 

 colored and clayey. 



Small calcareous concretions are com- 

 mon; and, except for the presence of a few 

 thin sandstones, the entire formation be- 

 uppershaie tween the Portage sandstones below and 

 limestone [ he Long Beards riffs fossiliferous layer. 



so far as it is exposed, bears a close resem- 

 blance to the Cashan.ua shales, and the 

 riv^Jm^rfdSiSSSS ^ssils bear a much closer relationship to 

 rVL^ii:^! the Portage fauna than to that of the 



near Fillmore. Stations to 15 



Chemung rocks. 



Grimes 

 sandstone 



Hatch flags 



Cashaqua 

 shale 



Middlesex 

 shale 



Genesee 



Genesee 

 lower shale 



