Cedar Creek LTER site in Minnesota (IMAGE) U.S. National Science Foundation Caption This is an oak savanna -- interspersed oaks and grasses -- in summer at the Cedar Creek LTER site in Minnesota. Credit NSF Cedar Creek LTER Site 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.