Close up Image of a Replicate Ice Core (image) National Science Foundation Caption The first replicate ice core ever taken from the high side of an ice-core borehole is shown. This is a core drilled at right angles to the main borehole to get additional information. It is 4.25 inches in diameter. Credit Jay Johnson, Ice Drilling Design and Operations, University of Wisconsin-Madison Usage Restrictions None 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.