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 map (Cenozoic basin, 3 types of flysch belt, volcanic rocks or fold belt). Data available in the attribute table include the age of the basin fill or rock (4 categories of Eon; 3 categories of Age/Period); and the thickness of basin fill (in kilometers, derived from isopachs and Bouger gravity data).
This coverage is not intended to be a complete representation of the printed map. It does NOT include the following features: Faults, folds; bathymetric contours; cities; geographic or map feature names; volcanic centers; wells; oil and gas fields; glaciers; Bouger gravity data, except where indicative of basin fill thickness; stratigraphic charts and inset maps of Cook Inlet and the North Slope; the correlation chart; explanation; or principal sources of data list.
