Isle Royale National Park, Michigan. Specimen from the Washington Island Flow. Ophitic texture is obscure, but characteristic dark chlorite splotches are visible. Circa 1971.
Dates
Date Taken
1971
Summary
Isle Royale National Park, Michigan. Specimen from the Washington Island Flow. Ophitic texture is obscure, but characteristic dark chlorite splotches are visible. Circa 1971. Figure 16, U.S. Geological Survey Professional paper 754-C; Figure 25, U.S. Geological Survey Bulletin 1309.
Summary
Isle Royale National Park, Michigan. Specimen from the Washington Island Flow. Ophitic texture is obscure, but characteristic dark chlorite splotches are visible. Circa 1971. Figure 16, U.S. Geological Survey Professional paper 754-C; Figure 25, U.S. Geological Survey Bulletin 1309.
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