1. Geochemical map showing distribution of anomalous element suites in nonmagnetic heavy-mineral concentrates from the Chugach National Forest, Alaska Yale Public content 1987. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Distribution Section ; Branch of Distribution. English. Public. Alaska and Chugach National Forest.