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Coral cores like this one reveal geologic history of Keys reefs

By Communications and Publishing
Two oceanographers look at a coral core stored in a wooden box
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Detailed Description

USGS Research Oceanographer Lauren Toth and Oceanographer Anastasios Stathakopoulos study a coral-reef core in the USGS’s Core Archive in St. Petersburg, Florida. Photo: Dominique Gallery, USGS.

Sources/Usage

Public Domain.