The Rural Municipality of Alexander is a rural municipality in the Eastern region of Manitoba, Canada. The office is located in St. Georges, Manitoba. The town of Powerview-Pine Falls lies adjacent to the municipality, as does the Sagkeeng First Nation Indian reserve. The Chevrefils District and Broadlands are located in the R.M.
Volcanology of Canada includes lava flows, lava plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, submarine volcanoes, calderas, diatremes, and maars, along with examples of more less common volcanic forms such as tuyas and subglacial mounds. It has a very complex volcanological history spanning from the Precambrian eon at least 3.11 billion years ago when this part of the North American continent began to form.
The Yellowknife greenstone belt, also called the Yellowknife Volcanic Belt, is an Archean greenstone belt in the southern Slave craton, Northwest Territories, Canada. It is mostly made of mafic volcanic rocks and is bordered to the east by batholithic intrusions of the Western Granodiorite Complex and beyond to the north by the Duckfish Lake Granite. Intrusive equivalents are collectively known as the Kam Group. Most of the Yellowknife townsite and the Con and Giant gold mines are within the Kam Group. The Yellowknife greenstone belt stands out as a positive topographic feature.
The Abitibi greenstone belt is a 2,800-to-2,600-million-year-old greenstone belt that spans across the Ontario–Quebec border in Canada. It is mostly made of volcanic rocks, but also includes ultramafic rocks, mafic intrusions, granitoid rocks, and early and middle Precambrian sediments.
The Uchi Subprovince is a Neoarchean volcanic sequence in Manitoba, Canada. It is at the southern margin of the North Caribou terrane and comprises a number of greenstone belts, which contains volcanic rocks that record some 280 million years of volcanism.
The Flin Flon greenstone belt, also referred to as the Flin Flon – Snow Lake greenstone belt, is a Precambrian greenstone belt located in the central area of Manitoba and east-central Saskatchewan, Canada. It lies in the central portion of the Trans-Hudson orogeny and was formed by arc volcanism during the Paleoproterozoic period. The Flin Flon – Snow Lake greenstone belt is 250 km long by 75 km wide and is exposed just north of McClarty Lake. The belt is bounded by metasedimentary gneisses and metavolcanics of the Kisseynew Domain to the north and extends to the south where it is unconformably overlain by Ordovician age dolomite.
The Swayze greenstone belt is a late Archean greenstone belt in northern Ontario, Canada. It is the southwestern extension of the Abitibi greenstone belt.
The Hope Bay greenstone belt, also called the Hope Bay volcanic belt, is a 42 km (26 mi) long Archean greenstone belt in western Nunavut, Canada. It consists of mostly mafic volcanic rocks and contains three major gold deposits called Boston, Doris and Naartok.
The Kam Group is a 10 km (6 mi) thick Archean volcanic group in the Yellowknife greenstone belt of the Northwest Territories, Canada. It consists of tholeiitic mafic and subordinate felsic volcanic rocks that were erupted in a submarine environment about 2706 million years ago.
The Red Lake greenstone belt is an Archean greenstone belt at the town of Red Lake in Northwestern Ontario, Canada. It consists of basaltic and komatiitic volcanics ranging in age from 2,925 to 2,940 million years old and younger rhyolite-andesite volcanics ranging in age from 2,730 to 2,750 million years old.
The volcanology of Eastern Canada includes the hundreds of volcanic areas and extensive lava formations in Eastern Canada. The region's different volcano and lava types originate from different tectonic settings and types of volcanic eruptions, ranging from passive lava eruptions to violent explosive eruptions. Eastern Canada has very large volumes of magmatic rock called large igneous provinces. They are represented by deep-level plumbing systems consisting of giant dike swarms, sill provinces and layered intrusions. The most capable large igneous provinces in Eastern Canada are Archean age greenstone belts containing a rare volcanic rock called komatiite.
Volcanology of Western Canada includes lava flows, lava plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, submarine volcanoes, calderas, diatremes and maars, along with examples of more less common volcanic forms such as tuyas and subglacial mounds.
Bernic Lake is a lake in the eastern part of the province of Manitoba, Canada. It is located just southwest of Nopiming Provincial Park, and just north of Whiteshell Provincial Park.
The Kanichee layered intrusive complex, also called the Kanichee intrusion and Ajax intrusion, is a layered intrusion in Northeastern Ontario, Canada, located in the central portion of Strathy Township about 6.5 km (4.0 mi) northwest of the town of Temagami. It consists of mafic-ultramafic rocks and is the largest of many mafic-ultramafic intrusions associated with felsic and mafic metavolcanic rocks in the northern Archean Temagami Greenstone Belt.
The Ecstall Greenstone Belt is a north-northwest trending greenstone belt in northwestern British Columbia, Canada, located in the Kitimat Ranges of the Coast Mountains between the communities of Prince Rupert and Kitimat. It is 80 km (50 mi) long and 3 km (1.9 mi) to 20 km (12 mi) wide and represents a small portion of the 2,000 km (1,200 mi) long Central Gneiss Complex. Rocks of the Ecstall Greenstone Belt are Precambrian and Paleozoic in age.
The Hunt River greenstone belt, also called the Hunt River volcanic belt, is a northeast trending Mesoarchean greenstone belt in Newfoundland and Labrador, Canada, located along the coast of Labrador about 25 km (16 mi) west of the town of Hopedale. It is 70 km (43 mi) long and consists of metavolcanic and metasedimentary rocks.
The Hunter Mine caldera is a caldera complex in the North Volcanic Zone of the Abitibi greenstone belt in Ontario and Quebec, Canada. It is located at the eastern end of Lake Abitibi.
Archean felsic volcanic rocks are felsic volcanic rocks that were formed in the Archean Eon. The term "felsic" means that the rocks have silica content of 62–78%. Given that the Earth formed at ~4.5 billion year ago, Archean felsic volcanic rocks provide clues on the Earth's first volcanic activities on the Earth's surface started 500 million years after the Earth's formation.
