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Corundum Hill, Unionville, Newlin Township, Chester Co., Pennsylvania, USA

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Latitude & Longitude (WGS84): 39° 53' 0'' North , 75° 43' 59'' West
Latitude & Longitude (decimal): 39.88334,-75.73333
Köppen climate type:Cfa : Humid subtropical climate


Occurrence in albite-corundum pegmatites.

Mineral List


11 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

Paleozoic
252.17 - 541 Ma



ID: 3025421
"Glenarm Wissahickon" formation

Age: Paleozoic (252.17 - 541 Ma)

Stratigraphic Name: Glenarm Group

Description: Lithologically similar to oligoclase-mica schist of the Wissahickon Formation (PZw), but also includes lenticular amphibolite bodies having ocean-floor basalt chemistry.

Comments: Digital map differences from 1980 printed map: name and map symbol changed from (Wissahickon Formation - eastern part) (Xw).

Lithology: Major:{mica schist}, Minor:{amphibolite,gneiss}

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

Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Silliman, Benjamin, Jr. (1849), "Descriptions and Analyses of Several American Minerals," American Journal of Science: 8: 381.
Smith, J. Lawrence and Brush, George J. (1853), "Reexamination of American Minerals, Part 1," American Journal of Science: 15: 209.
Ford, W.E. (1932), Dana's Textbook of Mineralogy, revised, John Wiley & Sons: 666-667.
Grant, Raymond W. (1971), "Pennsylvania Minerals" (PM), PM(98) (February), Keystone Newsletter.
Reed, Juliet C. (1976), Annotated Bibliography of Minerals New to the Pennsylvania List 1965-1974, The Mineralogical Society of Pennsylvania, Inc.: 59-60.

Mineral and/or Locality  
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