Basal ash flow in the Stevens Ridge Formation on Backbone Ridge. Mount Rainier National Park, Washington. ca. 1959.
Dates
Date Taken
1959
Summary
Lower part of the basal ash flow in the Stevens Ridge Formation on Backbone Ridge. The light-colored ash flow churned through soft saprolite on the pre-Stevens Ridge land surface and included fragments of the saprolite and less-weathered Ohanapecosh rocks in the lower 8 feet of the deposit. Mount Rainier National Park, Washington. ca. 1959. Figure 22, U.S. Geological Survey Professional paper 444.
Summary
Lower part of the basal ash flow in the Stevens Ridge Formation on Backbone Ridge. The light-colored ash flow churned through soft saprolite on the pre-Stevens Ridge land surface and included fragments of the saprolite and less-weathered Ohanapecosh rocks in the lower 8 feet of the deposit. Mount Rainier National Park, Washington. ca. 1959. Figure 22, U.S. Geological Survey Professional paper 444.
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