Ries — G K( ) l< Kr v of ( ) i : a x< ; b Coi n t y . 



4: > »1> 



Chemung with 

 Portage, . . 



Delaware Flags, . . 

 New Milford red shale, 

 Starucca sandstone, . 



400 feet, 

 100 u 

 600 " 



Chemung sandstone, 1,150 



200 



Hamilton, 



Genesee slate, white, 



( Hamilton, 1,400 



\ Marcellus, 800 



Upper Helder- ( Corniferous (Onondaga), . . . 

 berg, ... 1 Esopus, 



200 

 250? 



5,100 feet. 



Hudson River Shales and Sandstones. The rocks of this formation 

 cover such a large portion of Orange county, probably two-thirds of its area, 

 that they deserve special mention. 



In the western portion of the county, in Mount Hope and Greenville 

 townships, the shales and sandstones form the eastern slope of Shawangunk 

 mountain, previously mentioned. The beds here exposed are alternating 

 shales and sandstones, the former having a pronounced cleavage which is not 



Cr 



Figure 12a. Section across the south end of Sugar Loaf mountain, showing probable fault between 

 Cambrian limestone, C, and Pre-cambrian gneiss, G. The latter passes unconformable' under the 

 Bellvale flags. 



shared by the latter. In the railroad cut, w est of Otisville, the shales dip 

 40° W. Northeast of Otisville, along the road by Scudder's house, the sand- 

 stone members are prominent and strike N. 60°. The region north of Otis- 

 ville has a heavy covering of stratified drift, but where outcrops occur the dip 

 is west, while on the southeast side of Shawangunk hill the dip is to the 

 southeast, indicating a probable anticlinal arch with its axis along the river. 



The reddish sandstone and quartzitic members predominate in the region 

 around Howell's station. In the cut just west of the station, the sandstones 

 show a low anticline, and the next cut to the west, exhibits a monoclinal fold. 



