Large iron ore (magnetite) deposit discovered in 1810. The mine was 600 feet deep in 1879. Mining ceased in 1897, after 13 miners were killed in a rockslide.
Refs.:
Dana 6: 1063
Manchester, J.G.(1931): The Minerals of New York City & Its Environs, NY Mineralogical Club Bull. Vol. 3, No. 1:94.
The New York State Museum (www.nysam.org/foster/).
Tschernich, R. (1992): Zeolites of the World, 116
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Map Reference: 41°24'59"N , 73°38'59"W
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