REPORT OF THE STATE PALEONTOLOGIST 1902 1201 



and Darton as occurring, with diminishing thickness, to the 

 northward as far as Catskill creek. No such clear quartz sand 

 stone as that of the classical Oriskany localities of Union 

 Springs, Oriskany Falls and Schoharie, has yet been found in 

 the Little Mountain belt. To the southward the pebble beds 

 have been noted as far as Rosendale, and there is no evidence 

 that they do not extend beyond that point. They are not, how- 

 ever, mentioned by Ries from Orange county, and in Weller's 

 Walpack ridge section in New Jersey, there is a hiatus at the 

 horizon where they might be expected to occur. 



The upper sandy and cherty beds of the Oriskany are filled 

 with fossils, and at many points, specially where the beds have 

 slightly inclined attitudes permitting the surface waters con- 

 taining vegetable acids to seep through the joint cracks and 

 dissolve the calcareous cement, pockets of residual sandy mud 

 contain abundant, exquisitely preserved, silicified fossils, that 

 rival and often surpass the noted specimens from Cumberland 

 Md. The best collecting grounds for this material are: in the 

 West Shore Railroad cut between Port Ewen and the Wilbur 

 bridge; on the Walkill Valley Railroad at Whiteport; along the 

 western slope of the North hill at Rondout, beginning a short 

 distance north of Gross's house and extending to and beyond 

 Terry triangulation station. But by far the best locality and 

 one from which in the past the senior author has obtained large 

 and fine collections (now in the possession of Dr John M. Clarke 

 of Albany, and Prof. H. S. Williams of Yale University) is 

 along the right bank of Esopus creek between the Glenerie lead 

 mills and the iron bridge on the Mt Marion to Glasco road. 

 This locality is about 7 miles north of Kingston, and V/ 2 miles 

 east of Mt Marion station on the West Shore Railroad. Here 

 the beds are exposed, dipping about 15° to the westward, 

 in broad areas along the roadside and the bank of the creek, 

 and search in the decomposed material along the joint cracks 

 has brought to light a wealth of fossils, in a state of preservation 

 unequaled elsewhere in New York State. The fauna obtained 

 there, of which an incomplete list is given, comprises upward of 

 125 species, a large number for a single bed at a single locality. 



