The Endicott Mountains are a range of mountains, part of the Brooks Range in northern Alaska. They are located in the middle of the Brooks range and run some 151 miles (243 km) east–west. To the east are the Philip Smith Mountains and to the west are the Schwatka Mountains. The Endicott Mountains are separated from the Philip Smith Mountains by the Middle Fork of the Koyukuk River, the Dalton Highway, and Atigun Pass. The Endicott Mountains are separated from the Schwatka Mountains by Walker Lake, the upper reaches of the West Fork of the Kobuk River (Kaluluktok Creek), Akabluak Pass, and the Noatak River. The Endicott Mountains are separated from the mountains north of the Schwatka by Lucky Six Creek, Gull Pass, Gull Creek, a portion of the Alatna River and the Killik River.
| Endicott Mountains | |
|---|---|
 Endicott Mountains looking south, 1901 | |
| Highest point | |
| Peak | Mount Kiev |
| Elevation | 7,775 ft (2,370 m) |
| Coordinates | 68°19′52″N 149°32′49″W / 68.33111°N 149.54694°W |
| Dimensions | |
| Length | 151 mi (243 km) East-west |
| Width | 70 mi (110 km) North-south |
| Geography | |
 | |
| Location | center of range |
| Country | United States |
| Region | Alaska |
| Range coordinates | 68°22′N 152°18′W / 68.367°N 152.300°W |
From south to north the Endicott Mountains present long, broad glaciated valleys with rounded hills between rising in the center of the range to steep tors and aretes. The northern slopes of the Endicotts are steeper and more heavily incised, before they give way to the Arctic Coastal Plain.
Peaks
editPeaks in the Endicott Mountains include the Arrigetch Peaks, and highest to lowest:[1]
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as well as a number of unnamed peaks over 7000 ft.
Geology
editAbove the crystalline basement PreCambrian and Paleozoic sediments that have undergone partial metamorphosis . Above these are middle Cambrian sediments and the well documented Kanayuk Conglomerate.[2][3][4][5][6][7] The Kanayuk Conglomerate is a fluvial deposit, made by a river in its flood plain, and can be up to 8,000 feet (2,400 m) thick.[7] The Kanayuk Conglomerate began to be deposited in the Devonian and continued through into the Mississippian (early Carboniferous).[7] It is believed to have formed a huge delta almost 500 miles (800 km) long and 30 miles (48 km) wide.[7]
Notes
edit- ^ These peaks may all be found at Peakbagger.com as well as on the Chandler Lake, Killik River, Survey Pass and Wiseman topographic maps of the United States Geological Survey.
- ^ Nilsen, T. H. and Moore, T. E. (1982) "Sedimentology and Stratigraphy of the Kanayuk Conglomerate, Central and Western Brooks Range, Alaska—Report of the 1981 Field Season" United States Geological Survey Open file Report OF 82–674
- ^ Nilsen, T. H. and Moore, T. E. (1984) "Stratigraphic Nomenclature for the Upper Devonian and Lower Mississippian(?) Kanayuk Conglomerate, Brooks Range, Alaska" U.S. Geological Survey Bulletin 1529-A, pp. Al-A64
- ^ Nilsen, T. H.; Moore, T. E.; Balin, D. F. and Johnson, S. Y. (1982) "Sedimentology and Stratigraphy of the Kanayut Conglomerate, Central Brooks Range, Alaska—Report of 1980 Field Season" United States Geological Survey Open file Report OF 82–199
- ^ Nilsen, T. H.; Moore, T. E.; Brosgé, W. P. and Dutro, J. T., Jr. (1981) "Sedimentology and Stratigraphy of the Kanayut Conglomerate and Associated Units, Brooks Range, Alaska: Report of the 1981 Field Season" United States Geological Survey Open file Report OF 81–506
- ^ Nilsen, T. H.; Moore, T. E.; Dutro, J. T., Jr.; Brosgé, W. P. and Orchard, D. M. (1980) "Sedimentology and Stratigraphy of the Kanayuk Conglomerate and Associated Units, Central and Eastern Brooks Range, Alaska: Report of the 1978 Field Season" United States Geological Survey Open file Report OF 80–888
- ^ a b c d Harris, Ann G. et al. (2004) Geology of National Parks (6th edition) Kendall/Hunt Publishing Company, Dubuque, Iowa, page 380, ISBN 0-7872-9971-5
Further reading
edit- Handschy, James William (1989) Sedimentology and structural geology of the Endicott Mountains allochthon, central Brooks Range, Alaska PhD Thesis, Rice University, Abstract
External links
edit- "Endicott Mountains" from Peakbagger.com