Nature
Mount Churchill is a dormant, ice-covered volcano in Alaska’s Saint Elias Mountains, rising about 4,767 metres within the Wrangell Volcanic Field. Though now largely hidden by ice, its caldera, lava, tephra, and extensive pumice and ash deposits record major eruptions from the late Pleistocene into the Holocene. Its two White River Ash eruptions, about 1,890 years ago and in the winter of 852/853, were among North America’s largest in the last two millennia, spreading ash across Alaska and western Canada and leaving geological, archaeological, and possible cultural effects. The remote Bona-Churchill massif has also yielded valuable ice-core records of past climate, eruptions, dust, and wildfire.
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McCarthy, Alaska · United States
