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IMAGE 3221
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Bear Lake long cores before they were cut for shipping; one is 5.5 m and the other is 5.8 m containing organic lake mud and volcanic ash (tephra) layers deposited over the last 10,000-14,000 years. Lake coring in collaboration with Mt. Holyoke College and Northern Arizona University

Date: August 12, 2005 4:39 PM AST
Volcano(es):Redoubt
Photographer/Creator: Wallace, K. L.
URL:http://www.avo.alaska.edu/images/image.php?id=3221

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Image courtesy of AVO / U.S. Geological Survey.
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