Digital data for the geology of the Southern Brooks Range, Alaska

Open-File Report 2008-1149
Compiled by: Alison B. TillJulie A. DumoulinAnita G. HarrisThomas E. MooreHeather A. BleickBenjamin SiwiecKeith A. LabayFrederic H. Wilson, and Nora B. Shew



The growth in the use of Geographic Information Systems (GIS) has highlighted the need for digital geologic maps that have been attributed with information about age and lithology. Such maps can be conveniently used to generate derivative maps for manifold special purposes such as mineral-resource assessment, metallogenic studies, tectonic studies, and environmental research. This report is part of a series of integrated geologic map databases that cover the entire United States. Three national-scale geologic maps that portray most or all of the United States already exist; for the conterminous U.S., King and Beikman (1974a,b) compiled a map at a scale of 1:2,500,000, Beikman (1980) compiled a map for Alaska at 1:2,500,000 scale, and for the entire U.S., Reed and others (2005a,b) compiled a map at a scale of 1:5,000,000. A digital version of the King and Beikman map was published by Schruben and others (1994). Reed and Bush (2004) produced a digital version of the Reed and others (2005a) map for the conterminous U.S. The present series of maps is intended to provide the next step in increased detail. State geologic maps that range in scale from 1:100,000 to 1:1,000,000 are available for most of the country, and digital versions of these state maps are the basis of this product. The digital geologic maps presented here are in a standardized format as ARC/INFO export files and as ArcView shape files. The files named __geol contain geologic polygons and line (contact) attributes; files named __fold contain fold axes; files named __lin contain lineaments; and files named __dike contain dikes as lines. Data tables that relate the map units to detailed lithologic and age information accompany these GIS files. The map is delivered as a set 1:250,000-scale quadrangle files. To the best of our ability, these quadrangle files are edge-matched with respect to geology. When the maps are merged, the combined attribute tables can be used directly with the merged maps to make derivative maps.

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Additional publication details

Publication type Report
Publication Subtype USGS Numbered Series
Title Digital data for the geology of the Southern Brooks Range, Alaska
Series title Open-File Report
Series number 2008-1149
DOI 10.3133/ofr20081149
Year Published 2008
Language English
Publisher U.S. Geological Survey
Contributing office(s) Mineral Resources - Alaska
Description ReadMe; Tables; Maps; Text; Metadata; Data Files
Larger Work Type Report
Larger Work Subtype USGS Numbered Series
Larger Work Title Preliminary integrated geologic map databases for the United States
Country United States
State Alaska
Other Geospatial Southern Brooks Range
Online Only (Y/N) Y
Additional Online Files (Y/N) Y
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