Lightweight Pumice Boulders

Credit: KEN M. JOHNS/SCIENCE PHOTO LIBRARY

Caption: Geologist Abel Ramirez hefts two pumice boulders. Because of the large number of air pockets, pumice is relatively light. Panum Crater, California.

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Keywords: boulder, earth science, geological, geologist, geology, lift, lifting, light, lightweight, male, man, people, person, pumice, rock, science, scientist

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