Petrographic image of metagabbro rock, NOCA 35691b
Circular microscopic image of rock structure.
Microscopic image of a thin section of metavolcanic rock collected by Peter Misch high on Winchester Lookout Trail in 1961. One of six images. See also NOCA 35690. (Peter Misch Geology Collection, North Cascades NPS Complex Museum Collection.)
U.S. National Park Service
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