Filters: Tags: Southeastern Alaska (X)
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This data release contains four GIS shapefiles, one Google Earth kmz file, and five metadata files that summarize results from Interferometric Synthetic Aperture Radar (InSAR) analyses in the Glacier Bay region of Alaska and British Columbia. The principal shapefile (Moving_Ground) and the kmz file (GBRegionMovingGround) contain polygons delineating slow-moving (0.5-6 cm/year in the radar line-of-sight direction) landslides and subsiding fan deltas in the region. Landslides and fan deltas were identified from displacement signals captured by InSAR interferograms of Sentinel-1 C-band Synthetic Aperture Radar images. The images were acquired at 12-day intervals from June to October from 2018 to 2020. We applied the...
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Alaska,
Climate change,
Climatology,
Geomorphology,
Glacial geology,
Album caption and index card: Taku Harbor, Indian children and canoe. Juneau district, Southeastern Alaksa region, Alaska. May 25, 1905.
Categories: Image;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Kindle, E.M. Collection,
Photographers,
Southeastern Alaska,
photo print
The Bureau of Mines examined Yakobi Island and adjacent parts of Chichagof Island in Tongass National Forest, Southeast Alaska, in 1978 and 1979, as one part of the studies mandated by the Wilderness Act (Public Law 88-577). More than 1,800 lode mining claims had been recorded on several types of mineralized zones in the 460 square mile area. Nickel copper-cobalt magmatic segregations occur in norite in Bohemia Basin on Yakobi Island and at Mirror Harbor on the west coast of Chichagof Island. Reserves of 20 million tons averaging 0.31 percent nickel, 0.18 percent copper, and 0.04 percent cobalt have been announced. Both areas are being explored but the full extent of the mineralized zones remains unknown. Gold-silver-tungsten...
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