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Tuolumne Meadows to Sonora Pass Professional Review and Guide
"Before leaving the parking lot below imposing Lembert Dome, look at the large feldspar crystals in the rock of the dome’s base. This rock, called Cathedral Peak granite (granodiorite), solidified as a single unit several miles below the earth’s surface about 80 million years ago. The large, blocky crystals make outcrops of this particular granite—a pluton— very easy to identify and they afford rock climbers holds on otherwise slick, glacier-smoothed rock."
--Jeffrey P. Schaffer, Pacific Crest Trail: Northern California (Wilderness Press).
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