The Big Belt Mountains are a section of the

Rocky Mountains The Rocky Mountains, also known as the Rockies, are a major mountain range and the largest mountain system in North America. The Rocky Mountains stretch in straight-line distance from the northernmost part of western Canada, to New Mexico in ...

in the

U.S. The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

state of

Montana Montana () is a state in the Mountain West division of the Western United States. It is bordered by Idaho to the west, North Dakota and South Dakota to the east, Wyoming to the south, and the Canadian provinces of Alberta, British Columbi ...

. Situated mainly in the Helena National Forest, the mountains are used for logging and recreation for the surrounding residents. Nearby are the cities of Helena,

Townsend Townsend (pronounced tounʹ-zənd) or Townshend may refer to: Places United States *Camp Townsend, National Guard training base in Peekskill, New York *Townsend, Delaware *Townsend, Georgia *Townsend, Massachusetts, a New England town ** Townsend ...

, and White Sulphur Springs, as well as Canyon Ferry Lake and the Missouri River. The highest point in the Big Belt Range is Mount Edith at , while the center of the range is . The Big Belts lie primarily between the Missouri River drainage to the west and the Smith River drainage to the east. They are traversed by U.S. Highway 12 between Townsend in the Missouri drainage, and White Sulphur Springs in the upper Smith River drainage. The gulches on the western slopes of the Big Belts were noted historically for rich gold placer strikes. The richest were the 1864 and 1865 placer gold strikes in Confederate Gulch, including Montana Bar, which was one of the most concentrated gold placer strikes ever made. The range takes its name from the fact it is situated in a long belt-like arc. It stretches , making it a mid-length subrange of the Rocky Mountains. To the east are the Little Belts and to the south, somewhat continuing this arc, is the Bridger Range. The

Belt Supergroup The Belt Supergroup is an assemblage of primarily fine-grained sedimentary rocks and mafic intrusive rocks of late Precambrian (Mesoproterozoic) age. It is more than thick, covers an area of some 200,000 km2 (77,220 sq. mi), and is considered ...

series of rocks, which are primarily

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 the ...

mudstones, were named after this mountain range and the adjacent Little Belt Mountains. A particularly well-known example of exposed Belt Group mudstones in alternating purplish-red or pale bluish-green layers in the Big Belt Mountains is in

Wolf Creek Canyon The wolf (''Canis lupus''; plural, : wolves), also known as the gray wolf or grey wolf, is a large Canis, canine native to Eurasia and North America. More than thirty subspecies of Canis lupus, subspecies of ''Canis lupus'' have been reco ...

along Interstate 15 between Helena and

Great Falls Great may refer to: Descriptions or measurements * Great, a relative measurement in physical space, see Size * Greatness, being divine, majestic, superior, majestic, or transcendent People * List of people known as "the Great" *Artel Great (born ...

. While these rocks were named after these ranges of western-central Montana, and are found in them, they are more exposed and better known in northwestern Montana, northern

Idaho Idaho ( ) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyom ...

, and southeastern

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

, namely around

Flathead Lake Flathead Lake ( fla, člq̓etkʷ, label=Salish, kut, yawuʔnik̓ ʔa·kuq̓nuk) is a large natural lake in northwest Montana. The lake is a remnant of the ancient, massive glacial dammed lake, Lake Missoula of the era of the last interglacial. ...

and Glacier National Park.

References

External links

* Ranges of the Rocky Mountains Mountain ranges of Montana Landforms of Lewis and Clark County, Montana Landforms of Meagher County, Montana Landforms of Broadwater County, Montana Helena National Forest {{MeagherCountyMT-geo-stub

See also

References

External links