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Midcontinent Rift System
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Details
The Midcontinent Rift System (MRS) or Keweenawan Rift is a 2,000 km (1,243 mi) long geological rift in the center of the North American continent and south-central part of the North American plate. It formed when the continent's core, the North American craton, began to split apart during the Mesoproterozoic era of the Precambrian, about 1.1 billion years ago. The rift failed, leaving behind thick layers of rock that are exposed in its northern reaches, but buried beneath later sedimentary formations along most of its western and eastern arms. Those arms meet at Lake Superior, which is contained within the rift valley. The lake's north shore (illustration) in Ontario and Minnesota defines the northern arc of the rift. From the lake, the rift's eastern arm trends south to central lower Michigan. The western arm runs from Lake Superior southwest through portions of Wisconsin, Minnesota, Iowa, and Nebraska to northeastern Kansas.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786130685386
- Genre Geowissenschaften
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Sprache Englisch
- Anzahl Seiten 84
- Herausgeber Alphascript Publishing
- Größe H220mm x B150mm x T5mm
- Jahr 2010
- EAN 9786130685386
- Format Fachbuch
- ISBN 978-613-0-68538-6
- Titel Midcontinent Rift System
- Untertitel Rift, North American Plate, Laurentia, Mesoproterozoic, Precambrian, Lake Superior, North Shore (Lake Superior), Coldwell Complex, Mamainse Point Formation, Volcanism of Canada
- Gewicht 142g
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