Thin section of monzonite porphyry from sill by Deer Creek south of Pine Spring, Mount Pennell. Garfield County, Utah. 1939
Dates
Date Taken
1939
Summary
Thin section of monzonite porphyry from sill by Deer Creek south of Pine Spring, Mount Pennell; the large dark phenocrysts are hornblende. The remains of a basal section of aegirine-augite can be seen in the left center. The upper part of the section is fine-grained hornblendic inclusion. X 6. Garfield County, Utah. 1939. Figure 82-A, in U.S.Geological Survey Professional paper 228. 1953.
Summary
Thin section of monzonite porphyry from sill by Deer Creek south of Pine Spring, Mount Pennell; the large dark phenocrysts are hornblende. The remains of a basal section of aegirine-augite can be seen in the left center. The upper part of the section is fine-grained hornblendic inclusion. X 6. Garfield County, Utah. 1939. Figure 82-A, in U.S.Geological Survey Professional paper 228. 1953.
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