Geologic map
The Arctic quadrangle is well located to shed light on the basic geologic relations of northern Alaska. The rocks represent all of the stratigraphic systems from Cambrian to Cretaceous and all but one of the tectono-stratigraphic subterranes of the Brooks Range, from the autochthonous subterrane in the north to the allochthonous subterranes farther south.
Among the distinctive geologic features displayed in the Arctic quadrangle are voluminous volcanic rocks of probable Devonian age, a wide array of Carboniferous carbonate facies in the Lisburne Group (which here extends up into the Middle Pennsylvanian), the southward transition of Upper Devonian (Famennian) clastic facies from fluvial conglomerate to marine sandstone, a full display of Upper Devonian (Frasnian) reef-related strata, and fossiliferous Ordovician rocks in both carbonate and chert terranes. Most of the quadrangle is in the Arctic National Wildlife Refuge (ANWR) and Arctic Wildlife Refuge Wilderness. The quadrangle also includes Arctic Village, the only village in the region and a potential destination or transfer point for visitors to the wildlife refuge.
Generalized terrane map
This image was constructed from USGS and NASA data by Wm. Bowen and shows a northerly "satellite's eye" view over the northeastern part of Alaska. The Arctic Quadrangle covers much of the upper right quadrant of this image. The Brooks Range crosses the central part of this image. The Koyukuk (left foreground) and Yukon Rivers (right foreground) drain the Brooks Range. The Gates of the Arctic National Park & Preserve is located at the left center of this image while Arctic Village is in the foothills of the eastern extend of the Brooks Range at right center.
Files available for download:
i2673_sh1.pdf PDF file of Geologic map of the Arctic Quadrangle. Scale 1:200,000. Size 45 x 34 inches (5.8 MB)
i2673_sh2.pdf PDF file of generalized terrane map of the Arctic Quadrangle. Scale 1:200,000. Size ~30 x ~29 inches (4.4 MB)
i2673_sh1_90.eps Download an EPS version of this map (sheet 1) for plotting on a 36-inch-wide plotter (33.5 MB)
i2673_sh1.eps EPS file of geologic map of the Arctic Quadrangle. Scale 1:200,000. Size 31.5 x 31 inches (34 MB)
i2673_sh2.eps EPS file of geologic map of the Arctic Quadrangle. Scale 1:200,000. Size 48 x 36 inches (20 MB)
i2673pamphlet.pdf Pamphlet to accompany map; contains description of map units (38 pages; 205 kb)
For questions about this report, email Tom MooreDownload a free copy of Adobe Reader .
This report is also available in printed form by writing:
USGS Information Services
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Telephone: 1-888-ASK-USGS
E-mail: infoservices@usgs.gov
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The URL for this page is: http://pubs.usgs.gov/imap/i2673/
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Michael Diggles
Created: July 18, 2001 (cad)
Updated: June 22, 2007 (bwr, mfd)