Geology and Minerals

Devils Postpile National Monument

Devils Postpile National Monument is a U.S. national monument located near Mammoth Mountain in Eastern California. The monument protects Devils Postpile, an unusual rock formation of columnar basalt, "all closely and perfectly fitted together like a vast mosaic", and Rainbow Falls a waterfall on the Middle Fork of the San Joaquin River, which are also the two main attractions. The monument encompasses 798 acres (323 ha). In addition, the John Muir Trail and Pacific Crest Trail merge into one trail as they pass through the monument. Excluding a small developed area containing the monument headquarters, visitor center and a campground, the National Monument lies within the borders of the Ansel Adams Wilderness.

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See also

• ▸Geology of South Australia
• ▸Beit Sahour
• ▸Andesite

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