1008 



NEW YORK STATE MUSEUM 



HI 



IV' 



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 Nunda, 

 and a thin seam contains comminuted 

 crinoids and braehiopod 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 14 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 

 sh a a s ie aqua colored and clayey. 



Small calcareous concretions are com- 

 mon; and, except for the presence of a few 



Middlesex 



shale thin sandstones, the entire formation be- 



upper shale tween the Portage sandstones below and 



Styliola 



limestone the Long Beards riffs fossiliferous layer, 

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



lower shale 



blance to the Cashaqua shales, and the 

 riw 6 ftin^irfH£^?S 'ossils bear a much closer relationship to 



Moscow to Chemung sand- .-,-,-», « ,, ,\ ■ n j_i „ 



stone at Long Beards riffs, the Portage fauna than to that ot the 



near Fillmore. Stations to 15 



Chemung rocks. 



/<o$ 



Giimes 

 sandstone 



Hatch flags 



