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Dark gray porphyry spotted with rectangular white feldspar phenocrysts from head of Marsh Creek hollow. Adams County, Pennsylvania. 1927.

Dates

Date Taken
1927

Summary

Dark gray porphyry spotted with rectangular white feldspar phenocrysts from head of Marsh Creek hollow. Polished specimen. Adams County, Pennsylvania. 1927. Plate 32 in U.S. Geological Survey. Folio 225. 1929.

Contacts

Data Owner :
U.S. Geological Survey
Photographers :
Stose, George W.

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sgw01576.jpg thumbnail 5.34 MB image/jpeg

Rights

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Additional Information

Identifiers

Type Scheme Key
name photoLibrary sgw01576
number photoLibrary 33423
batch photoLibrary btch334
number_in_book photoLibrary 1576

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