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Volcano study helps measure historic ice sheet thickness

UBC geologists examine pyroclastic deposits near summit of tephra cone on south side of Kima'Kho. Key attributes of these deposits established that they were deposited above the level of a surrounding englacial lake.

UBC geologists examine pyroclastic deposits near summit of tephra cone on south side of Kima’Kho. Key attributes of these deposits established that they were deposited above the level of a surrounding englacial lake. Photo courtesy UBC Science.

Ancient tuyas hold climate clues

By Summit Voice

FRISCO —In what must have been incredible displays of fire and ice, ancient volcanoes once erupted under massive glacial ice sheets, leaving deposits that could help paleoclimatologists unravel some ice age puzzles.

In a recent study, University of British Columbia researchers surveyed those deposits at the Kima’ Kho tuya, which erupted under an ice sheet about 1.8 million years ago. Their findings suggest that he ancient regional ice sheet through which the volcano erupted was twice as thick as previously estimated. Continue reading

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