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A September 3, 2000, north-looking photograph taken from near the head of Harvard Arm, College Fiord, Prince William Sound, Chugach National Forest, Alaska. The photograph shows the advancing terminus of Harvard Glacier at the head of the fiord. Baltimore Glacier, a retreating hanging glacier is at the left side of the photo. Compare with a 1909 photograph from the same location - gus00208.
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A September 4, 2000 north-looking photograph taken from offshore of Toboggan Glacier, Harriman Fiord, Prince William Sound, Chugach National Forest, Alaska. The 2000 photograph documents the continuing thinning and retreat of Toboggan Glacier. The former tributary located on the north (left) side of the glacier has thinned and retreated significantly. Note the extensive vegetation that has developed on the beach and at the glaciers margins. A June 29, 1909 photograph, taken from the same location shows that Toboggan Glacier was already thinning and retreating and was surrounded by a large bedrock barren zone. Minimal vegetation existed on the fiord-facing hill slopes. By 1909, the terminus appears to have thinned...
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The U. S. Bureau of Mines and the U. S. Geological Survey did a resource assessment of * 40,500 ha (100,000 acre) between Unakwik Inlet and Columbia Glacier in the Chugach National Forest in South Central Alaska during 1992. The Bureau collected and evaluated data on 33 prospects, occurrences, and sample sites. The USGS collected and evaluated data I on the geology and geochemistry of the area. Bureau personnel visited 26 sites and collected 127 samples. Four of the sites were new discoveries. A mining feasibility study for 10 deposits having the best deposit grades and resources in the study area concluded that none of these deposits could be economically mined. The Bureau concluded that 30 sites have a low mineral...
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The Bureau of Mines (Bureau) and the U.S. Geological Survey (USGS) conducted a 4 -year (1979 -1982) mineral assessment study of the Chugach National Forest (CNF), Ak, as part of the Roadless Area Review and Evaluation (RARE II) Program. The USGS remapped the geology and distribution of mineral resources. The Bureau investigated mines, prospects, and mineral occurrences. This report describes the results of Bureau work in the central 790,880 acres of the Forest. Copper, with by- product zinc, silver, and gold, has been the major metal produced from the study area as well as from the entire Chugach National Forest. The majority of the copper deposits are concentrated within basaltic rocks on Knight Island but the...


    map background search result map search result map OFR 50-94 - U.S. Bureau of Mines Mineral Investigations in the Unakwik Area Chugach National Forest, Alaska. 1994. OFR 54-86 - Mineral Investigations in the Chugach National Forest, Alaska (Islands Area). 1986. OFR 50-94 - U.S. Bureau of Mines Mineral Investigations in the Unakwik Area Chugach National Forest, Alaska. 1994. OFR 54-86 - Mineral Investigations in the Chugach National Forest, Alaska (Islands Area). 1986.