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IMAGE 78541
AVO Image

Frozen block of pumice (>50 cm) of White River Ash (WRA) on the rim of Churchill caldera. Surface fines have been winnowed away since the eruption (846-847 CE); however, a few inches below this surface is solid (frozen) WRA.

Date: May 20, 1990 12:00 AM
Volcano(es):Churchill, Mt
Photographer/Creator: McGimsey, R. G.
URL:http://www.avo.alaska.edu/images/image.php?id=78541

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Image courtesy of AVO/USGS.
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Page modified: September 17, 2018 11:25
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