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Suffern Quarry (Union Hill Quarry), Suffern, Rockland Co., New York, USA

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Latitude & Longitude (WGS84): 41° 7' 3'' North , 74° 8' 36'' West
Latitude & Longitude (decimal): 41.11750,-74.14333


A trap rock quarry in the Preakness Basalt. Now (2012) abandoned, it was operated by Plaza Materials Corp.

Mapped by Volkert (2011) as being located in Preakness basalt

Mineral List


6 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

Late Triassic
201.3 - 237 Ma
Ladentown diabase and baslatic lava

Age: Late Triassic (201.3 - 237 Ma)

Stratigraphic Name: Ladentown Diabase

Comments: part of Newark Group 0-7000 ft. (0-2100 m).

Lithology: Major:{basalt}

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



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