BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 5, pp. 367-394, PL. 17 MARCH 28, 1894 



GEOLOGIC RELATIONS FROM GREEN POND, NEW JERSEY 

 TO SKUNNEMUNK MOUNTAIN, NEW YORK^^ 



BY X. H. DARTOX 



(^Read before the Society December 28, 189S) 

 CONTENTS 



Page 



Introductory 367 



The Formations • 368 



Review of their Investigation 368 



Skunnemunk Conglomerate 371 



Bellvale Flags 373 



Monroe Shales 374 



Oriskany Quartzites ■ 375 



Helderberg Limestone 378 



Longwood red Sliales 382 



Green Pond Conglomerate 383 



Hudson Shales 385 



Cambrian Limestone 380 



Structure 387 



Flexures 387 



Faults 390 



Overlaps 391 



Geologic History 393 



Introductory. 



Ill this paper there is described an outlying series of Paleozoic rocks 

 which occupy a narrow belt extending from the Archean highlands of 

 New Jersey into Orange county, New York. The general geographic 

 relations are shown in figure 1. The rocks are hmestones, shales, con- 

 glomerates, quartzites and flagstones, ranging from Middle Cambrian to 

 Middle Devonian in age. The harder members give rise to high rough 

 ridges, of which the most prominent are Skunnemunk, Bearfort, Bellvale, 

 Green Pond, Copperas, Kanouse and Bowling Green mountains. Green- 

 wood lake lies in one of the principal valleys. 



* Printed by permission of tlie Director of the United States Geological Survey. 

 LII-BcLL. Geol. Soc. kTA., Vol. 5, 1893. (367) 



