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 15 kilometres (10 mi) thick, covers an area of some 200,000 km2 (77,220 sq. mi), and is considered to be one of the world's best-exposed and most accessible sequences of Mesoproterozoic rocks.[1] It was named after the Big Belt Mountains in west-central Montana. It is present in western Montana and northern Idaho, with minor occurrences in northeastern Washington and western Wyoming.[2] It extends into Canada where the equivalent rocks, which are called the Purcell Supergroup, are exposed in southeastern British Columbia and southwestern Alberta.[3] The rocks of the Belt Supergroup contain economically significant deposits of lead, zinc, silver, copper, gold, and other metals in a number of areas,[4] and some of the Belt rocks contain fossil stromatolites.[5]
Spectacular outcrops of Belt rocks can be seen in Glacier National Park in northwestern Montana[6] and in Waterton Lakes National Park in southwestern Alberta.[7]
^MacLean, J.S.; Sears, J.W., eds. (2016). Belt Basin: Window to Mesoproterozoic Earth. Geological Society of America, Special Publication 522. pp. 1–384. ISBN 9780813725222.
^Cite error: The named reference ISU was invoked but never defined (see the help page).
^Cite error: The named reference Glass was invoked but never defined (see the help page).
^Lydon, John W. "Geology and metallogeny of the Belt-Purcell Basin. In: Goodfellow, W.D. (ed.), Mineral deposits of Canada: a synthesis of major deposit types, district metallogeny, the evolution of geological provinces, and exploration methods. Geological Association of Canada, Mineral Deposits Division, Special Publication no. 5, p. 581-607". Retrieved 29 April 2018.
^Cite error: The named reference O'Connor was invoked but never defined (see the help page).
^Alt, D.D. and Hyndman, D.W. 1986. Roadside geology of Montana. Mountain Press Publishing Co., Missoula, Montana, 427 p. ISBN 0-87842-202-1.
^Gordy, P.L., Frey, F.R. and Norris, D.K. 1977. Geological guide for the CSPG 1977 Waterton-Glacier Park Field Conference. Canadian Society of Petroleum Geologists, Calgary, Alberta, 93 p.
The BeltSupergroup is an assemblage of primarily fine-grained sedimentary rocks and mafic intrusive rocks of late Precambrian (Mesoproterozoic) age....
Metamorphism of argillites produces slate, phyllite, and pelitic schist. The BeltSupergroup, an assemblage of rocks of late Precambrian (Mesoproterozoic) age,...
The Barberton Greenstone Belt is situated on the eastern edge of the Kaapvaal Craton in South Africa. It is known for its gold mineralisation and for its...
extends into the northwestern United States where it is called the BeltSupergroup. It was named for the Purcell Mountains of British Columbia by R.A...
The BeltSupergroup series of rocks, which are primarily Precambrian mudstones, were named after this mountain range and the adjacent Little Belt Mountains...
(notably Lubumbashi, Kolwezi, and Likasi). It arises because of the Katanga Supergroup, a Neoproterozoic sequence of geological formations. In some contexts...
Cape Fold Belt is a fold and thrust belt of late Paleozoic age, which affected the sequence of sedimentary rock layers of the Cape Supergroup in the southwestern...
problem BeltSupergroup, a group of Mesoproterozoic sedimentary rocks Belt Publishing, an American publisher Balteus (disambiguation) Category:Belts (clothing)...
California. A glassy vitreous quartzite has been described from the BeltSupergroup in the Coeur d’Alene district of northern Idaho. In Canada, the La...
The Karoo Supergroup is the most widespread stratigraphic unit in Africa south of the Kalahari Desert. The supergroup consists of a sequence of units...
"sandstone and thin layers of shale from the Mount Shields Formation of the BeltSupergroup, with folds from compression that dates back to the Sevier Orogeny...
distinct bodies of sediment with depositional relief. The Proterozoic BeltSupergroup contains evidence of possible microbial mat and dome structures similar...
Oehler (1976). "Megascopic algae 1,300 million years old from the Beltsupergroup, Montana: a reinterpretation of Walcott's Helminthoidichnites". Journal...
and is separated from the larger Atlanta lobe in the south by the BeltSupergroup metamorphic rocks that compose the Salmon River Arch. Much of the Atlanta...
of Moine schists (what is now called the Moine Supergroup). The recognition of the Moine Thrust Belt in the early 1880s was a milestone in the history...
emplaced in western Laurentia. Early stages of rifting produced the BeltSupergroup, which is over 12 kilometers (7.5 mi) thick. By 750 Ma the breakup...
is called "Belt Rock" from the BeltSupergroup. The sedimentary rocks in this group formed between 1.47 and 1.4 billion years ago in the Belt Basin. The...
Australia and Laurentia. Siberia attached to the western US (via the BeltSupergroup), as in Sears & Price 2000. Little is known about the paleogeography...
District is hosted by rocks of the Pre-Cambrian BeltSupergroup, exceeding 20,000 feet in thickness. The Silver Belt is bounded by the Osburn Fault to the north...
belt. On top of the Archean basement, the Aravalli Supergroup overlies with clear unconformities separating the two strata. The Aravalli Supergroup is...
Mountain Sandstone (TMS) is a group of rock formations within the Cape Supergroup sequence of rocks. Although the term "Table Mountain Sandstone" is still...
layers of the Witwatersrand Supergroup of rocks, on the southern side of the Witwatersrand plateau. The Witwatersrand Supergroup strata which reach the surface...
deposits are hosted in shear zones in argillite of the Precambrian BeltSupergroup. Copper was discovered one mile northeast of Mineral Point in Iowa...
Called the Windermere Group in the United States and the Windermere Supergroup, Windermere Series, and Windermere System in Canada, the Windermere sequence...
unique, and leads to question about the formation of silver valley and beltsupergroup of which it was an ore body in the Prichard formation. Mitchell, Victoria...
origin of "molar-tooth" calcite structures in the middle Proterozoic BeltSupergroup, western Montana". Journal of Sedimentary Research. 68 (1): 104–114...
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