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Hogencamp Mine, Town of Tuxedo, Orange Co., New York, USA

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Latitude & Longitude (WGS84): 41° 14' 32'' North , 74° 7' 17'' West
Latitude & Longitude (decimal): 41.2422222222, -74.1213888889

An iron mine in magnetite ore located 5 miles North of the old Greenwood Furnace (no longer on maps) & southeast of Arden, in Tuxedo. One of the Greenwood group of mines. Host rock is hornblende gneiss. Active 1870-1880. Workings featured an open cut.

This iron deposit appears to be fundamentally different from most of the many other magnetite deposits in the Precambrian rocks of the region. It is localized in a brittle fracture zone developed in a pre existing mylonite (Gates, et al , 2003). Magnetite is associated with a skarn-like mineral assemblage. The deposit may be related to a widespread, post orogenic hydrothermal event that accompanied pegmatite emplacement between circa 1005 MA and 950 MA.

Mineral List

14 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

1000 - 1600 Ma
Hornblende granite and granite gneiss

Age: Mesoproterozoic (1000 - 1600 Ma)

Description: With subordinate leucogranite.

Lithology: Major:{granite,gneiss}, Minor:{leucocratic granitic}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Reis, Heinrich (1895), The Geology of Orange County, Geological Survey of New York: 454.

Clarke, John M. (1921), New York State Museum Bulletin Nos. 249-250, Magnetic Iron Deposits of Southeastern New York (Sep-Oct 1921): 44 & 97.

Gates, A.E., Valentino, D.W., Chiarenzelli, J., Gorring, M., and Hamilton, M. (2003), Field Trip to the Western Hudson Highlands; 2003 Long Island Geologists Conference, 30 p.

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