808 NEW YOKK STATE MUSEUM 



Leliigli Valley railroad. Quarries have been opened in it at 

 Phelps. '■ 



HalP states .that marl underlies the marsh bordering Flint 

 creek south of the village of Bethel, and probably occurs under 

 the swamp near Yictor, as well as in the swamps at the heads of 

 Hemlock and Ganadice lakes. 



Orange and Rockland counties ^ 



In Rockland and Orange counties there begins another series 

 of belts of the Cambro-Silurian limestone formation, which ex- 

 tend in a northeasterly direction. These same belts continue 

 across the river into Dutchess county and also extend up into 

 Columbia county. In the latter, however, they are so unimportant 

 as not to be worth considering. 



The Cambro-Silurian limestones are found at several places in 

 Orange county. One area occurs around Central Valley (pi. 57) 

 and Turner, extending thence westward to Monroe. It is finely 

 crystalline, light bluish gray, and rather silicious; still it is used 

 for lime. Another area extends from a point about 2 miles south 

 of Sugarloaf past Stone Bridge, Warwick and 'New Milford into 

 !N'ew Jersey. 



Its character in this area is similar to that of the limestone 

 around Monroe and Turner, and a quarry has been opened in it 

 2 miles south of Goshen, on the road to Warwick. 



It may at times become quite silicious, showing as much a8 

 18fo silica, and there may also be a variation between the different 



1 Ceol. 4th dist. N. Y. p. 458. 



2 Barrett, S. T. Notes on the Lower Helderberg rocks of Port Jervis, N. Y. 

 {see Am. jour. sci. 3d ser. 13: 385) 



Darton, N. H. ■ Area of Upper Silurian rocks near Cornwall Station, east- 

 ern central Orange .county, N. Y. {see Am. jour. sci. 1886. 3d ser. 31: 209) 



Geolo2:ic relations from Green pond, N. J., to Skunnemunk mountain, 



N, Y. {see Bui. 5. Geol. soe. Am. p. 367) 



Dwight, W. B. Calciferous as well as Trenton fossils in the Wappinger 

 limestone at Rochdale and a Trenton locality at Newburgh, N. Y. {see Am. 

 jour. sci. 1880. 19: 50) 



Kemp, J. F. & Hollick, A. The granites at Mounts Adam and Eve. {see 

 Annals N. Y. acad. sci. 7: 638) 



Eies, Heinrich. Report on the geology of Orange county, {see 15th an. rep't 

 N. Y. state geol. p. 393) 



Mather, W. W. Geol. 1st dist. N. Y. 1843. 



