Coring a head of Porites lobata
![A man with SCUBA gear operates a big coring drill to take a sample of coral from a reef.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/WestMaui3Drill.jpg?itok=pitryX1w)
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).
Sources/Usage
Public Domain.