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O'Neil Mine (Nail Mine), Lake Mombasha, Town of Monroe, Orange Co., New York, USA

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Latitude & Longitude (WGS84): 41° 17' North , 74° 11' West
Latitude & Longitude (decimal): 41.28333,-74.18333


An iron mine in magnetite ore located about 3 miles SE of Monroe and just North of Lake Mombasha. Closed 1880. Workings featured a pit 50 feet deep by 600 feet long (NE - SW) or up to 1,500 feet long by closing (NYS Museum Bull.).

Mineral List


22 valid minerals. 1 erroneous literature entry.

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

Mesoproterozoic
1000 - 1600 Ma
Amphibolite

Age: Mesoproterozoic (1000 - 1600 Ma)

Description: Pyroxenic amphibolite, hornblende gneiss, commonly biotitic, garnetiferous; subordinate calcsilicate rock.

Lithology: Major:{amphibolite}, Minor:{hornblende gneiss}, Incidental:{calc silicate rock}

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.

References

- The Minerals of New York City & Its Environs, New York Mineralogical Club Bull. Vol. 3, No. 1, Manchester, J.G. (1931): 85
- New York State Museum Bull. Nos. 249-250 (Sep-Oct 1921), Magnetic Iron Deposits of SE NY, Clarke, John M.: Index Map, 45 & 109-110
- Geol. Survey of the State of New York, Geology of Orange Co., Roes, Heinrich (1895): 451-452
- Rocks & Minerals: 20:468.

Mineral and/or Locality  
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