Terrestrial Coring Techniques (IMAGE) University of Cincinnati Caption There were several large water reservoirs surrounding the site of Tikal. Here, Brian Lane of UC takes a soil core from the Corriental reservoir, the southernmost of the major reservoirs. Here, the depth of the reservoir is being determined. Credit University of Cincinnati Usage Restrictions None License Licensed 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.