Tuolumne Intrusive Suite
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The Tuolumne Intrusive Suite is the youngest and most extensive of the intrusive suites of Yosemite National Park, and also comprises about 1/3 of the park's area. The Suite includes Half Dome Granodiorite, Cathedral Peak Granite, and Kuna Crest Granodiorite. The largest
pluton In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth. Intrusions have a wide variety of forms and com ...
of the Tuolumne Intrusive Suite is Cathedral Peak Granodiorite, which extends long distances both the north and south of
Tuolumne Meadows Tuolumne Meadows () is a gentle, dome-studded, sub-alpine meadow area along the Tuolumne River in the eastern section of Yosemite National Park in the United States. Its approximate location is . Its approximate elevation is . The term ''Tuolumn ...
. The southwestern part of the Tuolumne Intrusive Suite is made up of Half Dome Granodiorite. The youngest, smallest, and most central rock body is of the Johnson Granite Porphyry


Age

From oldest to youngest, the rock units are # Kuna Crest Granodiorite 91-88 Ma # Half Dome Granodiorite 85–83.4 Ma # Cathedral Peak Granodiorite 83.7 Ma # Johnson Granite Porphyry 82.4 Ma


See also

* Fine Gold Intrusive Suite * Intrusive Suite of Buena Vista Crest * Intrusive Suite of Merced Peak * Intrusive Suite of Sonora Pass * Intrusive Suite of Yosemite Valley * Johnson Granite Porphyry


References

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External links


Roadside geology, in Tuolumne Meadows, with the Tuolumne Intrusive Suite
Geology of California Geology of Yosemite National Park