Rees — Gsology of Oeange County. 



The same beds are much better exposed in an old time quarry in tin- 

 woods (76) a few hundred feet to the north. 



The Pentamerus limestone is there well exposed with a thickness of 

 about thirty feet. The beds strike N. 40° E., and dip 45° W. Fossils are 

 abundant in the upper half of the section, the recognizable ones being: 

 Pentamerus galeatus, Spirifer perlamelhsus, Spirifer cychpteras, Leptama 

 rkomboidalis, Anastrophia Vernewili, Ast/ylospongia iiiornata, Rhync7ionella 

 equwahis, Atrypa reticula/ris, Zaphrentis, sp., Favosites, sp. 



Stromatopora concentrica is very abundant near the base of the section, 

 the lower layers of which may represent the upper part of the Tentaculite 

 limestone. 



About half-way between 39 ami 76, and a few feet farther to the cast, 

 is a small quarry by an old limekiln (13). The beds exposed here are 

 much sheared, dark grey Tentaculite limestone, containing abundant remains 

 of Meristina, Leperditia, Spirifei* Vanwcem/i and St/ropheodonta varistriata. 



From this exposure to the Shawangunk grit exposures at the base of the 

 mountain to the east, is not less than 600 feet; there are, however, no out- 

 crops. Just what formations underlie this interval is uncertain. The red 

 Medina sandstones probably underlie a portion of it, and they crop out in 

 the same valley about two miles farther south. The Coralline limestone may 

 also be here, but if so, is concealed by the drift. 



On the slope of the field bordering the river, and about fifty feet east 

 of outcrop 39, there are several outcrops of grey and blue-grey, shaly and 

 arenaceous limestones of Oriskany ;ige. Their total thickness is probably not 

 over fifty to seventy-five feet. A prominent easterly dipping cleavage exists, 

 but the dip could not be determined (40). Fossils are not uncommon, and 

 are abundant in the calcareous layers, especially in the outcrops near the foot 

 of the slope. The list of species collected is as follows: Avicula, sp., Renss- 

 elaeria, sp., Ohonostrophia complcmata, Leptocodia flabellites, Tentaculites 

 elongatvs, Platydstoma depressum, Strophostylus ? , Discina grandisf, Spirifer 

 a r rectus, Merista lata, Pterinea, .sp;, Tentaculites, sp., Stictopora, sp., Edrio- 

 criwus sacoulus, Leptocodia dichotoma, Lingula, sp., Eatonia pecul ia ris. 



The Oriskany forms a series of ledges on the w est slope of the hill, on 

 which the limestone ledges 39 and 76 occur. The most southern outcrop 

 on the ridge is justwest of 39, where there are small ledges (40) of arena- 

 ceous and shaly limestones. Fossils are not unci mnnon in the more calcareous 

 layers, and the following species were found at this point : Spirifer arrectus, 

 Bryozoa, Stictopora, sp., Klriocriiius sacculus, Leptocodia dichotoma, Platyo- 

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