Aspen Stands (IMAGE) Michigan Technological University Caption The researchers sampled reforested aspen stands located in Baraga, Delta, Dickinson and Menominee Counties that are owned and actively managed by Weyerhaeuser Company (formerly Plum Creek Timber Company) and for which a 40-year commercial logging record exists, providing the scientists with a data set to verify against field measurements. Credit Robert Froese/Michigan Tech Usage Restrictions Please credit photographer and institution. 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.