34 Geology of Hudson County, New Jersey. 



Now Jersi'y ; tliey are coiiUct deposits, very commonly associ- 

 ated with outbursts of trap, and although sometimes making a 

 good showing of ore, yet at least in New Jersey have never 

 proved profitable in working. Copper-bearing sandstone of the 

 same nature as that of the Schuyler mine, is exposed in a small 

 quarry near Arlington, at the base of the bluffs overlooking 

 the Newark meadows. 



On the northern side of Snake Hill, the Triassic sedimentary 

 rocks are well shown in the prison quarry, and present their 

 normal dip of lb° N. W. Interstratified Avitli the reddish- 

 brown sandstones and shales, are two irregular beds of light- 

 colored sandstone, from two to four feet thick, impregnated 

 with the carbonate of copper, and closely resembling the sand- 

 stone in the old copper-mine at Belleville. On the west side 

 of the hill, where the sandstones are exposed close up to the 

 tra]), they have been shattered in every direction, and are 

 light-colored and sometimes i)iukish in tint ; the dip of the 

 rocks here is from 30° to 35° N. W. The Trias is again 

 exposed on the south side of the hill in a small cut made for 

 the New York and Greenwood Lake Eailroad ; the rocks are 

 here light-colored sandstone, with partings of shale dipping 

 14° N. W., and all considerably fractured. The upland ad- 

 joining Snake Hill on the northward is also underlaid at a 

 depth of a few feet, as borings show, by sandstones and shales. 



A well eighty feet deep, on the Newark turnpike, near its 

 junction with the Belleville turnpike, south of Snake Hill, 

 penetrated the red sandstone which underlies this section of the 

 swamp ; other wells in the same region, some of them two hun- 

 dred feet deep, failed to reach it.* 



On the western side of Bergen Neck, the Triassic beds appear, 

 and have been quarried to a limited extent. 



On the eastern border of Hudson County, beneath the trap 

 bluffs along the bank of the Hudson, the Triassic sedimentary 

 beds are again exposed. The stratified rocks aj^pear first, com- 

 mencing at the southward, beneath the trap of Bergen Hill 



Vide Table No. 1 at the end of this article. 



