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Spring Valley Cave, Spring Valley, Minnesota

Spring Valley Cave, Spring Valley, Minnesota

Caves explore walls and ceiling of the 440 million year old Dubuque limestone and dolostone formations to study climate change.
43727369
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RM
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42-43727369
Stock Photo ID:
42-43727369
Date Photographed:
August 23, 2011
Model Released:
No Release
Property Released:
No Release
Photographer:
Credit:
© Layne Kennedy/Corbis
License Type:
Rights Managed (RM)
Category:
Collection:
Max File Size:
71 MB - 6144px × 4088px • 20.00in. × 13.00in @ 300 ppi

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