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USGS diver taking a core of a 100-year-old coral in USVI

By St. Petersburg Coastal and Marine Science Center 2012 (approx.)
USGS diver taking a core of a 100-year-old coral in USVI
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Detailed Description

USGS diver taking a core of a 100-year-old coral to allow reconstruction of past ocean temperatures in St. Thomas, U.S. Virgin Islands.

Sources/Usage

Public Domain.