Riker Hill, Livingston, Essex Co., New Jersey, USA

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A 1970's housing development built atop the summit of Riker Hill in the Hook Mountain (Third Watchung) basalt. Blasting was necessary to remove rock for the construction of foundations and utility trenches. Mineralization occurred in amygdaloidal cavities in the basalt.

Ref.:

Manchester, J.G. (1931) The Minerals of New York City and Its Environs. New York Mineralogical Club Bulletin, 3:89.

Pollack, R. (1977) Riker Hill, New Jersey -- An Active Collecting Area. Rocks & Minerals, 52:541-2

Rothstein, J. (1978) The Minerals of Riker Hill, Livingston, New Jersey. Lapidary Journal, 32:1124-35

Map Reference: 40°49'8"N , 74°17'52"W

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Mineral List:

Babingtonite
Baryte
Calcite
Chalcopyrite
Chrysocolla
Datolite

Gypsum
var: Selenite
Hematite
Limonite
Malachite
Pectolite
Prehnite

'Pumpellyite'
Pyrite
Quartz
Sphalerite
'Stilbite'
'Thomsonite'

18 entries listed. 13 valid minerals.

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