Copy of Borehole (IMAGE) University of South Florida Caption Peering into the borehole of the operation to retrieve sediment and water samples from Mercer Lake. Credit: Kathy Kasic. Credit Billy Collins Usage Restrictions NA License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.