Aporhyolite banded by chain spherulites, from Corls ridge north of South Mountain Sanatorium. Franklin County, Pennsylvania. 1927.
Dates
Date Taken
1927
Summary
Aporhyolite banded by chain spherulites, from Corls ridge north of South Mountain Sanatorium; spherulitic fabric replaced by granular fabric. Franklin County, Pennsylvania. 1927. Plate 27 in U.S. Geological Survey. Folio 225. 1929.
Summary
Aporhyolite banded by chain spherulites, from Corls ridge north of South Mountain Sanatorium; spherulitic fabric replaced by granular fabric. Franklin County, Pennsylvania. 1927. Plate 27 in U.S. Geological Survey. Folio 225. 1929.
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