Tuolumne Intrusive Suite

The Tuolumne Intrusive Suite is one of several intrusive suites in Yosemite National Park. These also include

  1. Sentinel granodiorite
  2. Fine Gold Intrusive Suite
  3. Intrusive Suite of Buena Vista Crest
  4. Intrusive Suite of Jack Main Canyon
  5. Intrusive Suite of Merced Peak
  6. Intrusive Suite of Sonora Pass
  7. Intrusive Suite of Yosemite Valley
The Tuolumne Intrusive Suite contains the words Yosemite National Park

The age and composition of the Tuolumne Intrusive Suite

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, is the most extensive intrusive suite in the Park. It contains rock types including Half Dome Granodiorite and Cathedral Peak Granite,[1] also, Kuna Crest Granodiorite. Oldest to youngest rocks are

  1. Kuna Crest Granodiorite,
  2. Half Dome Granodiorite,
  3. Cathedral Peak Granodiorite (which is about 86 million years old), to
  4. Johnson Granite Porphyry.

The youngest, smallest, and most central rock body is of the Johnson Granite Porphyry, a variety of porphyry.[2]

The southwestern part of the Tuolumne Intrusive Suite is made up of Half Dome Granodiorite.[2]

The Tuolumne Intrusive Suite and Cathedral Peak Granodiorite

The largest pluton of the Tuolumne Intrusive Suite is Cathedral Peak Granodiorite, which extends long distances both the north and south of Tuolumne Meadows.[2]

See also

References
  1. "Granite". NPS. Retrieved 28 December 2018.
  2. Huber, N. King (1987). "The Geologic Story of Yosemite National Park (1987)". yosemite.ca.us. Retrieved 28 December 2018.


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