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Geologic Trip, Tuolumne
Meadows Olmstead Point Olmstead Point is in Tenaya Valley on
Highway 120 about one mile south of Tenaya Lake. During the glacial episodes
the Tenaya Valley was filled with the Tenaya glacier which was moving from
the Tuolumne icefield toward Yosemite Valley. As the glacier slid down the
valley, it scooped out the depression now filled by Tenaya Lake and also
smoothed and polished the hard granodiorite at Olmstead Point. When the glacier melted, it left numerous glacial erratics
lying on the surface of the polished granite. You can see good examples
of glacial polish and erratics by taking the 1/4-mile nature trail from the
parking area to Olmstead Point. Exterior Websites National Park Service:
Yosemite Hikes:
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