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Coring a head of Porites lobata

By Pacific Coastal and Marine Science Center July 2013 (approx.)
A man with SCUBA gear operates a big coring drill to take a sample of coral from a reef.
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Detailed Description

USGS engineering technician Pete Dal Ferro checks the status of the hydraulic drill during the coring of a head of Porites lobata, 4 meters (13 feet) in diameter, off Olowalu, west Maui. The resulting core may document environmental conditions as far back as pre-European times. The water depth is approximately 3 meters (10 feet).

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Public Domain.

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