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American West Geology

Yellowstone supervolcano eruptions more frequent; historic eruption actually two events, researchers conclude

New conclusions surface about the mighty supervolcano in Yellowstone National Park, often cited for a massive eruption that covered the region in hot ash.

Filed Under: American West Geology, Yellowstone Ecology

Yellowstone supervolcano imagery shows underground plume larger than earlier seismic readings indicate

New images from the University of Utah suggest that the large plume of partly molten rock underneath Yellowstone may be larger than previously believed. However, no predictions of when a cataclysmic eruption of the famed supervolcano might occur were offered.

Filed Under: American West Geology, Yellowstone Ecology

Glaciologist: Central Alaska Range glacier advances

The lower portion of the McGinnis Glacier was observed covered in cracks, crevasses and ice pinnacles — evidence that the glacier moved forward.

Filed Under: Alaska Ecology, American West Geology

Yellowstone volcanic crater changes tied to molten rock movement

It is believed that about 640,000 years ago (during the Pleistocene epoch), a massive volcano erupted, creating a caldera in the center of what is now Yellowstone National Park.

Filed Under: American West Geology, Yellowstone Ecology

River sediment buildup may be a factor in certain subduction zone earthquakes

Over millions of years, sediment typically accumulates to great depths, from one-half mile to nearly 2 miles, and in rare cases, 3 miles deep.

Filed Under: American West Geology, Pacific Northwest & Alaska Ecology

Eastern California shear zone puzzles seismologists

The Eastern California Shear Zone runs roughly parallel to the San Andreas Fault from the Gulf of California and is a wide area in western Nevada.

Filed Under: American West Geology, California Ecology

Alaska quake altered Yellowstone hydrothermal system

A powerful earthquake that rocked Alaska in 2002 changed the timing and behavior of some of Yellowstone’s geysers and hot springs.

Filed Under: Alaska Ecology, American West Geology, Wyoming Recreation & Environment

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