| Abstract: | This map and accompanying digital files represent part of a systematic effort to release geologic data for the United States in a uniform manner. All the geologic data in this series will be published as parts of the U.S. Geological Survey Data Series. The geologic data in this series have been compiled from a wide variety of sources, ranging from state and regional geologic maps to large-scale field mapping. The data are presented for use at a nominal scale of 1:500,000, although individual datasets may contain data suitable for use at larger scales. The metadata associated with each release will provide more detailed information on sources and appropriate scales for use. Associated attribute databases accompany the spatial database of the geology and are uniformly structured for ease in developing regional- and national-scale maps.
The 1:500,000-scale geologic map of the Yukon-Koyukuk Basin, Alaska, covers more than 200,000 square kilometers of western Alaska or nearly 15 percent of the total land area of the state. It stretches from the Brooks Range on the north to the Kuskokwim River and lower reaches of the Yukon River on the south and from Kotzebue Sound, Seward Peninsula, and Norton Sound on the west to the Yukon-Tanana Uplands and Tanana-Kuskokwim Lowlands on the east. It includes not only the northern and central part of the basin, but also the lands that border the basin. The area is characterized by isolated clusters of hills and low mountain ranges separated by broad alluviated interior and coastal lowlands. Most of the lowlands, except those bordering Kotzebue Sound and Norton Sound, support a heavy vegetation cover. Exposures of bedrock are generally limited to rubble-strewn ridgetops and to cutbanks along the rivers.
The map of the Yukon-Koyukuk Basin was prepared largely from geologic field data collected between 1953 and 1988 by the U.S. Geological Survey and published as 1:250,000-scale geologic quadrangle maps. Additional data for parts of the Wiseman, Ruby, Medfra, and Ophir quadrangles came from 1:63,360-scale quadrangle maps published by the Alaska Division of Geological and Geophysical Surveys. The map also incorporates some unpublished field data for the Ruby quadrangle collected by R.M. Chapman between 1944 and 1977 and for parts of the Tanana, Bettles, Norton Bay, and Candle quadrangles collected by W.W. Patton, Jr. and others between 1954 and 1985. Sources of geologic map data for each of the eighteen 1:250,000-scale quadrangles used in compiling this 1:500,000-scale map of the Yukon-Koyukuk Basin as well as sources of general geologic information pertaining to the entire map area are provided in the ‘Sources of Information‘ section. |
| Genre: | USGS Numbered Series |
| ProdID: | 97486 |
| Citation Author: | Patton, William W., Jr.; Wilson, Fredric H.; Labay, Keith A.; Shew, Nora |
| Citation Contributing Office: | Alaska Science Center |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | Version 1.0 |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | 0672000 |
| Citation LatS: | 0630000 |
| Citation LonE: | -1500000 |
| Citation LonW: | -1620000 |
| Citation Month: | |
| Citation No Pagination: | N |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | N |
| Citation Phsyical Description: | Report: iv, 26 p.; Map Sheets: Sheet 1-49 x 43.5 inches, Sheet 2-41 x 32.5 inches; Digital Data |
| Citation Projection: | Alaska Albers Equal Area Conic |
| Citation Public Comments: | |
| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Scientific Investigations Map |
| Citation Series Code: | SIM |
| Citation Series Number: | 2909 |
| Citation Search Results Text: | Geologic Map of the Yukon-Koyukuk Basin, Alaska; 2009; SIM; 2909; Patton, William W., Jr.; Wilson, Fredric H.; Labay, Keith A.; Shew, Nora |
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| Citation Volume: | |
| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | Geologic Map of the Yukon-Koyukuk Basin, Alaska; 2009; SIM; 2909; Patton, William W., Jr.; Wilson, Fredric H.; Labay, Keith A.; Shew, Nora |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/sim/2909/ |
| URL (INDEX PAGE): | http://ngmdb.usgs.gov/Prodesc/proddesc_86626.htm |
| Date Other: | Sat, 9 May 2009 00:00 -0500 |
| Publisher: | U.S. Geological Survey |
