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- Great_Falls_Tectonic_Zone abstract "The Great Falls Tectonic Zone is a major intracontinental shear zone between the Hearne craton and Wyoming craton basement rock of the Archean Eon which form part of the North American continent. The zone is an area about 100 miles (150 km) wide extending from the southwestern Idaho-Montana border across Montana to the northwestern Montana-Saskatchewan-North Dakota border. It is named for the Great Falls of the Missouri River, a major geologic feature of the area. The central and western portions of the zone are believed to be about 1.1 to 3.3 billion years old. The central part of the zone lacks Archean rock, however, leading at least one group of scientists to speculate that it was formed very late in the Paleoproterozoic Era.The Great Falls tectonic zone has been periodically active since the Proterozoic, and possibly as late as the Holocene. Little of the zone is visible due to Phanerozoic cover, the exception being the Little Belt Mountains. However, it is believed that the tectonic zone controlled the geologic development of nearby basins and subbasins.The Great Falls tectonic zone was first identified in 1985. Geologists originally believed the zone was part of the Wyoming craton, but now conclude that it is distinct from it. There is continuing controversy over whether the region is a shear zone or suture, and the role the zone played in the formation of the North American continent. At one time, both the Great Falls Tectonic Zone and the Vulcan structure were both considered sutures, but debate remains open on the point. At least one group of geologists has concluded the zone represents the closure of an ocean basin. The zone lacks gravity anomalies or electromagnetic signatures which would allow scientists to conclude that it was generated by subduction. There is significant evidence that the zone has been periodically remineralized since Precambrian times. Square Butte, Shaw Butte, Crown Butte and the other structures of the Adel Mountains Volcanic Field lie astride the tectonic zone near the city of Great Falls.".
- Great_Falls_Tectonic_Zone thumbnail GreatFallstectoniczone.jpg?width=300.
- Great_Falls_Tectonic_Zone wikiPageID "24366698".
- Great_Falls_Tectonic_Zone wikiPageLength "5993".
- Great_Falls_Tectonic_Zone wikiPageOutDegree "30".
- Great_Falls_Tectonic_Zone wikiPageRevisionID "670907159".
- Great_Falls_Tectonic_Zone wikiPageWikiLink Adel_Mountains_Volcanic_Field.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Archean.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Basement_(geology).
- Great_Falls_Tectonic_Zone wikiPageWikiLink Category:Archean_geology.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Category:Geology_of_Montana.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Category:Precambrian_United_States.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Continent.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Depression_(geology).
- Great_Falls_Tectonic_Zone wikiPageWikiLink Gravity_anomaly.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Great_Falls,_Montana.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Great_Falls_(Missouri_River).
- Great_Falls_Tectonic_Zone wikiPageWikiLink Great_Falls_of_the_Missouri_River.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Hearne_craton.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Holocene.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Idaho.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Laurentia.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Little_Belt_Mountains.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Mineralization_(geology).
- Great_Falls_Tectonic_Zone wikiPageWikiLink Montana.
- Great_Falls_Tectonic_Zone wikiPageWikiLink North_American_craton.
- Great_Falls_Tectonic_Zone wikiPageWikiLink North_Dakota.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Paleoproterozoic.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Phanerozoic.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Precambrian.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Saskatchewan.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Shear_zone.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Subduction.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Suture_(geology).
- Great_Falls_Tectonic_Zone wikiPageWikiLink Vulcan_structure.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Wyoming_Craton.
- Great_Falls_Tectonic_Zone wikiPageWikiLink Wyoming_craton.
- Great_Falls_Tectonic_Zone wikiPageWikiLink File:GreatFallstectoniczone.jpg.
- Great_Falls_Tectonic_Zone wikiPageWikiLinkText "Great Falls Tectonic Zone".
- Great_Falls_Tectonic_Zone hasPhotoCollection Great_Falls_Tectonic_Zone.
- Great_Falls_Tectonic_Zone wikiPageUsesTemplate Template:Reflist.
- Great_Falls_Tectonic_Zone subject Category:Archean_geology.
- Great_Falls_Tectonic_Zone subject Category:Geology_of_Montana.
- Great_Falls_Tectonic_Zone subject Category:Precambrian_United_States.
- Great_Falls_Tectonic_Zone hypernym Zone.
- Great_Falls_Tectonic_Zone type Settlement.
- Great_Falls_Tectonic_Zone comment "The Great Falls Tectonic Zone is a major intracontinental shear zone between the Hearne craton and Wyoming craton basement rock of the Archean Eon which form part of the North American continent. The zone is an area about 100 miles (150 km) wide extending from the southwestern Idaho-Montana border across Montana to the northwestern Montana-Saskatchewan-North Dakota border. It is named for the Great Falls of the Missouri River, a major geologic feature of the area.".
- Great_Falls_Tectonic_Zone label "Great Falls Tectonic Zone".
- Great_Falls_Tectonic_Zone sameAs m.07s50sk.
- Great_Falls_Tectonic_Zone sameAs Q5599167.
- Great_Falls_Tectonic_Zone sameAs Q5599167.
- Great_Falls_Tectonic_Zone wasDerivedFrom Great_Falls_Tectonic_Zone?oldid=670907159.
- Great_Falls_Tectonic_Zone depiction GreatFallstectoniczone.jpg.
- Great_Falls_Tectonic_Zone isPrimaryTopicOf Great_Falls_Tectonic_Zone.