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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
Photographer/Creator: Wallace, K. L.

Citation Information:
Image courtesy of AVO / U.S. Geological Survey.
Please cite the photographer and the Alaska Volcano Observatory/U.S. Geological Survey when using this image.

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