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AK
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This dataset consists of a polygon coverage and associated attribute data derived from the onshore portion of the 1996 "Generalized Thermal Maturity Map of Alaska" compiled by M.J. Johnsson and D.G. Howell, which was published as Plate 1 in US Geological Survey Bulletin 2142: "Thermal Evolution of Sedimentary Basins in Alaska". The published map summarizes vitrinite reflectance and conodont alteration index data (both measure the thermal maturity of rocks) into generalized units that can be shown cartographically at 1:2,500,000. This digital dataset includes the 8 map units indicated on the original map. (5 thermal maturity levels; 2 rock or sediment type; 1 "no data"). The data quality of the generalized information...
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This dataset consists of a polygon coverage and associated attribute data derived from the onshore and offshore portions of the 1994 "Map showing Sedimentary Basins in Alaska" by C.E. Kirschner. This map is Plate 7 in Volume G-1: "The Geology of Alaska", published by the Geological Society of America, as part of their Decade of North American Geology (DNAG) series of publications. The published map indicates the locations of Cenozoic basins, their age and thickness of sedimentary fill; the locations of Mesozoic flysch basins, Cenozoic volcanic rocks, and some metasedimentary rocks, generalized to be shown cartographically at 1:2,500,000 scale. This digital dataset includes the 6 map units indicated on the original...
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This data set represents part of a systematic effort to release geologic map data for the United States in a uniform manner. Geologic data in this series has been compiled from a wide variety of sources, published and unpublished, ranging from state and regional geologic maps to field mapping. Preliminary Geologic Map of Southcentral to Southeast AK - ranging from the Cook Inlet region, located at the northern part of the Gulf of Alaska to Prince Rupert and Dixon Entrance quadrangles on the south. This data set is a portion of a statewide geology database, which is being compiled by the U.S. Geological Survey's National Surveys and Analysis (S) project, whose goal is to compile geologic geochemical, geophysical,...
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This dataset consists of a polygon coverage and associated attribute data derived from the 1994 map "Latest Cretaceous and Cenozoic magmatic rocks of Alaska" compiled by E.J. Moll-Stalcup, D.A. Brew, and T.L. Vallier. This map was originally published (at 1:2,5000,0000) as Plate 5 in Volume G-1, "The Geology of Alaska", edited by G. Plafker and H.C. Berg, and published by the Geological Society of America (GSA). Volume G-1 (The Geology of Alaska) is one of a series published by GSA for the Decade of North American Geology (DNAG), and is often referred to as the DNAG-Alaska volume. The map (Plate 5) is a statewide summary of magmatic (igneous) rocks grouped into geologic units that can be portrayed cartographically...
    map background search result map search result map Polygon Data from 1996 "Generalized Thermal Maturity Map of Alaska" Polygon Data from "Latest Cretaceous and Cenozoic Magmatic Rocks of Alaska" Polygon Data from 1994 "Map Showing Sedimentary Basins in Alaska" Preliminary Geologic Map of Southcentral to Southeast AK Preliminary Geologic Map of Southcentral to Southeast AK Polygon Data from 1996 "Generalized Thermal Maturity Map of Alaska" Polygon Data from "Latest Cretaceous and Cenozoic Magmatic Rocks of Alaska" Polygon Data from 1994 "Map Showing Sedimentary Basins in Alaska"