The Endicott Mountains are a range of mountains, part of the Brooks Range in northern

Alaska Alaska ( ; russian: Аляска, Alyaska; ale, Alax̂sxax̂; ; ems, Alas'kaaq; Yup'ik: ''Alaskaq''; tli, Anáaski) is a state located in the Western United States on the northwest extremity of North America. A semi-exclave of the U.S ...

. They are located in the middle of the Brooks range and run some 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 Koyukuk River (; ''Ooghekuhno' '' in Koyukon, ''Kuuyukaq'' or ''Tagraġvik'' in Iñupiaq) is a tributary of the Yukon River, in the U.S. state of Alaska. It is the last major tributary entering the Yukon before the larger river empties in ...

, the Dalton Highway, and

Atigun Pass Atigun Pass ( Atigun Pass, after an avalanche
), elevation , is a high

Walker Lake, the upper reaches of the West Fork of the

Kobuk River The Kobuk River (''Kuuvak'' in Iñupiaq) (also Kooak, Kowak, Kubuk, Kuvuk, or Putnam) is a river located in the Arctic region of northwestern Alaska in the United States. It is approximately long. Draining a basin with an area of ,Brabets, T.P. ...

(Kaluluktok Creek), Akabluak Pass, and the

Noatak River The Noatak River ( ik, Nuataam Kuuŋa) is a river in the northwestern part of the U.S. state of Alaska. Description The Noatak River's headwaters are on the north flank of Mount Igikpak in the Schwatka Mountains of the Brooks Range in the Ga ...

. 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 The Killik River is a tributary of the Colville River in the U.S. state of Alaska. It begins in the northern portion of Gates of the Arctic National Park and flows north onto property of the Arctic Slope Regional Corporation. A clickable Portab ...

. 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

Peaks in the Endicott Mountains include the Arrigetch Peaks, and highest to lowest: as well as a number of unnamed peaks over 7000 ft.

Geology

Above the

crystalline A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macros ...

basement A basement or cellar is one or more Storey, floors of a building that are completely or partly below the storey, ground floor. It generally is used as a utility space for a building, where such items as the Furnace (house heating), furnace, ...

PreCambrian The Precambrian (or Pre-Cambrian, sometimes abbreviated pꞒ, or Cryptozoic) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of th ...

and

Paleozoic The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ' ...

sediments that have undergone partial metamorphosis . Above these are middle Cambrian sediments and the well documented Kanayuk Conglomerate.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 80–888Harris, Ann G. ''et al.'' (2004) ''Geology of National Parks'' (6th edition) Kendall/Hunt Publishing Company, Dubuque, Iowa
page 380
The Kanayuk Conglomerate is a fluvial deposit, made by a river in its flood plain, and can be up to thick. The Kanayuk Conglomerate began to be deposited in the

Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, w ...

and continued through into the Mississippian (early Carboniferous). It is believed to have formed a huge delta almost long and wide.

Notes

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External links

"Endicott Mountains"
from Peakbagger.com Brooks Range Gates of the Arctic National Park and Preserve Landforms of Yukon–Koyukuk Census Area, Alaska Mountains of Northwest Arctic Borough, Alaska Mountains of Unorganized Borough, Alaska

Peaks

Geology

Notes

Further reading

External links