Definition of Keweenawan. Meaning of Keweenawan. Synonyms of Keweenawan

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Definition of Keweenawan

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Meaning of Keweenawan from wikipedia

- The Midcontinent Rift System (MRS) or Keweenawan Rift is a 2,000 km (1,200 mi) long geological rift in the center of the North American continent and south-central...
- The Keweenawan Supergroup is a supergroup of volcanic and sedimentary rocks that fill the Midcontinent Rift System in the U.S. states of Michigan, Wisconsin...
- breaking up in the Cryogenian. This period includes the formation of the Keweenawan Rift at about 1100 Mya. Fossils of the oldest known ****ually reproducing...
- only 21 feet (6.4 m) below the lake's surface. The shoal is a hump of Keweenawan basaltic lava flows with ophitic interiors and amygdaloidal tops in an...
- (Sverdrup Basin) Iceland Karoo-Ferrar Kerguelen (Broken Ridge) Marathon Keweenawan Long Range Mackenzie (Coppermine River Mackenzie **** swarm) Matachewan...
- 2018-06-08. Huber, N. King (1973). "The Portage Lake Volcanics (Middle Keweenawan) on Isle Royale, Michigan". Geological Survey Professional Paper. Professional...
- Geological map of North America showing (in beige) the Midcontinent Rift, here labeled Keweenawan Rift....
- nearly rifted apart along the Midcontinent Rift System. This produced the Keweenawan Supergroup, whose flood basalts are rich in copper ore. Laurentia was...
- lasted about 10 million years. Hundreds of millions of years later, the Keweenawan Rift occurred in the same area creating the basin that would eventually...
- area of the rift. The rock sequences thereby created are known as the Keweenawan Supergroup. Rocks of this group north of Lake Superior are the layers...