Ries — Geology of Orange County. 



435 



New Jersey, and their thickness is considerable. The following section is 

 shown in Bennett's quarry (Barrett, 1878) : 



Tentaculite limestone, 30 feet. 



Favosite limestone, 4 to 6 " 



Lower Pentamerus limestone, 50 " 



Delthyris shaly limestone, 175 " 



Upper Pentamerus limestone, ........ 250 " 



Oriskany sandstone, 100 " 



Esopus slate, 500 to 800 " 



This entire section is not exposed in the face of the quarry, but is 

 included in the ridges to the west, between the quarry and the railroad. The 

 fossils are abundant in nearly all the layers, and a full list has been given by 

 Barrett. The upper portion of the Upper Pentamerus is noteworthy on 

 account of being crowded with trilobite remains. The relation of these beds 

 to the Oriskany has been suggested by Barrett and demonstrated by 

 Beecher.* They form the crest of the ridge known as the Trilobite ridge, 

 in whose southeastern face the quarry lies.-f 



Between Bennett's quarry and that east of Cuddebackville, there are 

 few outcrops of the Helderberg limestone. There is a good exposure of the 

 shaly limestone at a point just south of the intersection of the roads from 

 Shin hollow and Huguenot (77). It strikes N. 40° E., and dips 60° W. (540 

 feet A. T.) Fossils are not uncommon, especially Spi/rif&r rnacropleurus, 

 Eatonia mediaUs, Leptosti-opJiia Becki, Orthostrophia, Ooslospira imbricata, 

 Orthoihetes Woohoorthana, O. punctuUfera, O. radiata. 



No exposures of the Clinton or Niagara were found, though they occur 

 in Nearpass's quarry, south of the state line. 



The Oriskany sandstones and impure limestones and the Esopus slates 

 and grits dip westward under the gravelly dip of the Neversink valley, and 

 the middle and upper Devonian formations rise from the valley on its western 

 and northwestern edge. 



The Onondaga limestone unconformable overlies the Esopus slate at 

 Carpenter's Point (83). It forms Carpenter's Point and crops out along the 

 road opposite the cemetery entrance. It is a grey limestone, in layers a few 

 inches thick, and contains numerous elliptical flint nodules, from one inch 

 to a foot long. The weathering of the limestone give it a rough surface, 

 caused by the irregular projecting chert nodules. These nodules sometimes 



* Amer. Jour. Sci., Vol. 45. p. 410, 1892. 



+ Mr. Gilbert van Ingen has given the writer considerable information concerning the regiou east of Port Jervis. 



