Alaska State Geology (IMAGE) U.S. Geological Survey Caption The Alaska Geologic Map shows the generalized geology of the state, each color representing a different type or age of rock. Credit Frederic Wilson, USGS 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.