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This data lists the historically active volcanoes of Alaska and the year of the last major eruptive event. The volcanoes listed meet at least one of the following criteria since 1700 CE: (1) documented, unquestioned eruption, or (2) a strongly suspected eruption, often an eruption documented in the historical account with very little information (current geologic knowledge must not contradict the eruption account), or (3) persistent (usually on the order of decades, but certainly longer than several months) fumaroles, with temperatures (where measured) within ~10 degrees C of the boiling point, or (4) significant, measured, volcanic-related, non-eruptive deformation, (5) documented earthquake swarm with strongly...
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In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired LiDAR (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. LiDAR data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications...
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This map illustrates extents and types of unconsolidated deposits and bedrock in the Big Delta A-4 Quadrangle, Alaska. This map is based on field observations begun by P�w� in 1949 and by Reger in 1976. Unit characteristics and extents were determined during field visits and by interpreting 1:40,000-scale black-and-white aerial photographs taken in August 1949 and 1:63,360-scale, false-color infrared aerial photographs taken in July 1978, August 1980, and August 1981.
map background search result map search result map Christmas Copper Mine Section C-C' Phonodoree Shaft Geologic Map of 300 Level Bunker Hill Underground Workings, 500 Level King Hecla Copper Company Geologic Formations Section Map Gold Basin Drill Hole Assays Allison Mine, Section Along A-A' Looking Northeast United Verde Extension 809 Drill Section 225 Degrees Bonanza 215 Int. Geologic Map of a Portion of Cochise County United Verde Extension Geology Interpreted Under Post-Cambrian Cover with Structural Interpretation MM3 Safford Geological Cross Section J-J' Squaw Peak, Philips Petroleum, Sheet 2 Seligman Iron Ore Deposit Geologic and Topographic Map MM16 Geological Compilation Iron King North Prospect Cross Section with Assay Data Drill Hole Number 1 Christmas Copper Corporation Geologic Plan 770 Level West Side 3rd Level, Underground Workings and Geology Historically active volcanoes of Alaska High-resolution lidar data for infrastructure corridors, Valdez Quadrangle, Alaska Geologic map of the Big Delta A-4 Quadrangle, Alaska Geologic map of the Big Delta A-4 Quadrangle, Alaska High-resolution lidar data for infrastructure corridors, Valdez Quadrangle, Alaska Historically active volcanoes of Alaska