Midcontinent Rift System — Geological map of North America showing (in white) the Midcontinent Rift, here labeled Keweenawan Rift. Lake Superior occupies the apex of the rift. The Midcontinent Rift System (MRS) or Keweenawan Rift is a 2,000 km (1,200 mi) long… … Wikipedia
Beaver-Bay-Komplex — Das schattierte Reliefbild zeigt den Duluth Komplex, der sich bogenförmig von Duluth zum Pigeon Point zieht und dabei die Mesabi Range und die Gunflint Range unterbricht Der Duluth Komplex, der damit verbundene Beaver Bay Komplex (der oft als… … Deutsch Wikipedia
North Shore Volcanic Group — Das schattierte Reliefbild zeigt den Duluth Komplex, der sich bogenförmig von Duluth zum Pigeon Point zieht und dabei die Mesabi Range und die Gunflint Range unterbricht Der Duluth Komplex, der damit verbundene Beaver Bay Komplex (der oft als… … Deutsch Wikipedia
Duluth Complex — Shaded relief image showing Duluth Complex arcing from Duluth to Pigeon Point, interrupting and splitting the Mesabi and Gunflint Ranges The Duluth Complex, the related Beaver Bay Complex (often treated as part of the Duluth Complex),[1] and the… … Wikipedia
Duluth-Komplex — Das schattierte Reliefbild zeigt den Duluth Komplex, der sich bogenförmig von Duluth zum Pigeon Point zieht und dabei die Mesabi Range und die Gunflint Range unterbricht Der Duluth Komplex, der damit verbundene Beaver Bay Komplex (der oft als… … Deutsch Wikipedia
igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary … Universalium
Volcanism in Canada — Canada has examples of almost every type of volcano found on earth, including stratovolcanoes, calderas, cinder cones, shield volcanoes, maars, submarine volcanoes and tuyas. Most of Canada s volcanoes are located in British Columbia. Several… … Wikipedia
Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… … Universalium
Lake Nipigon — Location Ontario Coordinates … Wikipedia
Columbia River Basalt Group — The Columbia River Basalt Group (including the Steen and Picture Gorge basalts) extends over portions of five states. The Columbia River Basalt Group is a large igneous province that lies across parts of the Western United States . It is found in … Wikipedia
