North Cascades National Park, Washington. Plagioclase arkose and argillite sequence exposed where Grizzly Creek has cut along the strike of the beds.
Dates
Date Taken
1966
Summary
North Cascades National Park, Washington. Plagioclase arkose and argillite sequence exposed where Grizzly Creek has cut along the strike of the beds. View is south. Circa 1966. Figure 10-A, U.S. Geological Survey Bulletin 1325.
Summary
North Cascades National Park, Washington. Plagioclase arkose and argillite sequence exposed where Grizzly Creek has cut along the strike of the beds. View is south. Circa 1966. Figure 10-A, U.S. Geological Survey Bulletin 1325.
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