438 



Report of the State Geologist. 



After passing the cross-roads at a small post-office, three miles north of 

 Sparrowbush, and turning down the valley to the south, there are abundant 

 exposures of the grey Chemung sandstones. They are well seen in Robert 

 Coulter's quarry, north of Sparrowbush, where they strike N. 40° E. and 

 dip 10 to 20° W. The quarry face is thirty feet high. The rock is a grey 

 flaggy sandstone, heavily bedded in the lower portions of the quarry. It 

 is traversed by numerous joints, whose faces are often lined with quartz 

 crystals. 



The Chemung formation of Deer Park township consists for the most 

 part of greyish sandstones, which are sometimes thinly bedded. In the 

 southern portion of the township the boundary is much farther to the west, 

 and on account of the scarcity of fossils there is some difficulty in fixing 

 the exact eastern limits. 



Prosser gives several Chemung localities in his bulletin on the Devonian 

 of Eastern New York and Pennsylvania. They are : 



A mile east, up the road from Rose Point and below Mr. McCarron's 

 house, are thin flaggy sandstones- of a greenish grey color, which contain 

 Chemung fossils (1,478 A2). Prosser lists several species, and the following 

 were found by the writer: Trojndoleptus carinati/s, Ohonetes, sp., Tentaou- 

 lites, sp. 



Near the top of the hill, and north of the road, is Meyers quarry (47). 

 The rock is a bluish grey flagstone, with shaly partings. Fern stems occur 

 in some of the layers, which dip 13° N. W. 



From McCarron's house up to the school-house, along the same road, are 

 many outcrops of thin-bedded bluish grey sandstones, with occasional shaly 

 partings. They strike N. 30° E. and dip 30° W. (46). 



About 500 feet north of the school-house is Jackson's quarry. The 

 rock is bluish grey Chemung sandstone, with joints running N. 30° E. and 

 N. 30 & W. The layers strike K. 60° E. and dip 25° N. W. About fifteen 

 feet are exposed in the quarry. The lower beds are thicker and contain 

 fragmentary plant-remains. 



Two miles west of north of Brookville and three miles northeast of 

 Cuddebackville, is the Ferris quarry, 1,220 feet A. T. The rock is a coarse 

 grey sandstone, witli partings of greenish to olive argillaceous shale. It dips 

 18 to 20° and 40° W. of N. Prosser considers this to be the same horizon 

 as the Starucca sandstone. 



Below is the section along the Delaware river, from Pond Eddy to Port 

 Jervis, as measured by White and modified by Prosser : 



