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The Thompson River is the largest tributary of the Fraser River, flowing through the south-central portion of British Columbia, Canada. The Thompson River has two main branches, the South Thompson River and the North Thompson River. The river is home to several varieties of Pacific salmon and trout. The area's geological history was heavily influenced by glaciation, and the several large glacial lakes have filled the river valley over the last 12,000 years. Archaeological evidence shows human habitation in the watershed dating back at least 8,300 years. The Thompson was named by Fraser River explorer, Simon Fraser, in honour of his friend, Columbia Basin explorer David Thompson. Recreational use of the river includes whitewater rafting and angling.
The Republic of Manitobah was a short-lived, unrecognized state founded in June 1867 by Thomas Spence at the town of Portage la Prairie in what is now the Canadian province of Manitoba.
Taloyoak or Talurjuaq, formerly known as Spence Bay until 1 July 1992, although the body of water on which it is situated continues to be known as Spence Bay — same as the body of water on which Iqaluit is situated continues to be known as Frobisher Bay — is located on the Boothia Peninsula, in the Kitikmeot Region of Nunavut, Canada. The community is served only by air and by annual supply sealift. Taloyoak, the northernmost community in mainland Canada, in Inuktitut means "large blind", referring to a stone caribou blind or a screen used for caribou hunting. The community is situated 460 km (290 mi) east of the regional centre of Cambridge Bay, 1,224 km (761 mi) northeast of Yellowknife, Northwest Territories.
Spences Bridge is a community in the Canadian province of British Columbia, situated 35 km (22 mi) north east of Lytton and 44 km (27 mi) south of Ashcroft. At Spences Bridge the Trans-Canada Highway crosses the Thompson River. In 1892, Spences Bridge's population included 32 people of European ancestry and 130 First Nations people. There were five general stores, three hotels, one Church of England and one school. The principal industries are fruit growing and farming. The population as of the 2021 Canadian census was 76, a decrease of 23.2 per cent from the 2016 count of 99.
Tuber Hill is a small 600,000-year-old basaltic stratovolcano that was constructed on the Bridge River highlands when nearby valleys were packed with ice. Tuber Hill is part of the Garibaldi segment of the Canadian Cascade Arc, but is not in the geographic Cascade Range.
Black Dome Mountain is the northernmost summit of the Camelsfoot Range, which lies along the west side of the Fraser River, north of Lillooet, British Columbia, Canada. It is an ancient butte-like volcano located in the formation known as the Chilcotin Group, which lie between the Pacific Ranges of the Coast Mountains and the mid-Fraser River in British Columbia, Canada.
Volcanic activity is a major part of the geology of Canada and is characterized by many types of volcanic landform, including lava flows, volcanic plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, submarine volcanoes, calderas, diatremes, and maars, along with less common volcanic forms such as tuyas and subglacial mounds.
Castle Rock is a volcanic plug located 13 km (8 mi) west of Iskut and 8 km (5 mi) northwest of Tuktsayda Mountain in British Columbia, Canada. Castle Rock is part of the Pacific Ring of Fire that includes over 160 active volcanoes and is in the Klastline Group of the Northern Cordilleran Volcanic Province and last erupted in the Pleistocene.
The Crowsnest Formation, also called the Crowsnest Volcanics, is a geological formation in southwestern Alberta, Canada, on the southwestern margin of the Western Canada Sedimentary Basin. It was named for the Crowsnest Pass near Coleman, Alberta. The formation consists mostly of pyroclastic rocks that were laid down in a series of explosive eruptions about 100 million years ago during the Albian stage of the Early Cretaceous epoch. It contains unusual minerals such as melanite and analcime.
Maquinna is an active submarine mud volcano on the Coast of British Columbia, Canada, located 16–18 km (9.9–11.2 mi) west of Vancouver Island. It rises approximately 30 m (98 ft) above the mean level of the northeastern Pacific Ocean and lies directly along the southern expression of the left lateral, strike-slip Nootka Fault.
The Sverdrup Basin Magmatic Province is a large igneous province located on Axel Heiberg Island and Ellesmere Island, Nunavut, Canada near the rifted margin of the Arctic Ocean at the end of Alpha Ridge.
The Mamainse Point Formation is a geologic formation in Algoma District in Northeastern Ontario, Canada. It is located 64 km (40 mi) north of Sault Ste. Marie along Lake Superior. The rocks comprising the Mamainse Point Formation are volcanic in origin, having been deposited by volcanism of the Midcontinent Rift System.
The volcanism 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.
Volcanism of Western Canada has produced lava flows, lava plateaus, lava domes, cinder cones, stratovolcanoes, shield volcanoes, greenstone belts, submarine volcanoes, calderas, diatremes and maars, along with examples of more less common volcanic forms such as tuyas and subglacial mounds.
The Salal Glacier volcanic complex is a complex volcano in the Pacific Ranges of the Coast Mountains in southwestern British Columbia, Canada, located near the upper Bridge River. It is part of a volcanic group called the Bridge River Cones which in turn is part of the Garibaldi Volcanic Belt of the Canadian Cascade Arc.
Sham Hill is a volcanic plug in the Pacific Ranges of the Coast Mountains in southwestern British Columbia, Canada, located near the upper Bridge River. It is part of a volcanic group called the Bridge River Cones which in turn is part of the Garibaldi Volcanic Belt of the Canadian Cascade Arc.
The Canadian Cascade Arc, also called the Canadian Cascades, is the Canadian segment of the North American Cascade Volcanic Arc. Located entirely within the Canadian province of British Columbia, it extends from the Cascade Mountains in the south to the Coast Mountains in the north. Specifically, the southern end of the Canadian Cascades begin at the Canada–United States border. However, the specific boundaries of the northern end are not precisely known and the geology in this part of the volcanic arc is poorly understood. It is widely accepted by geologists that the Canadian Cascade Arc extends through the Pacific Ranges of the Coast Mountains. However, others have expressed concern that the volcanic arc possibly extends further north into the Kitimat Ranges, another subdivision of the Coast Mountains, and even as far north as Haida Gwaii.
La Negra Formation is a geologic formation of Jurassic age, composed chiefly of volcanic and volcaniclastic rocks, located in the Coast Range of northern Chile. The formation originated in marine and continental (terrestrial) conditions, and bears evidence of submarine volcanism as well as large explosive eruptions. The volcanism of La Negra Formation is thought to have lasted for about five million years.
The geology of Antigua and Barbuda is part of the Lesser Antilles volcanic island arc. Both islands are the above water limestone "caps" of now inactive volcanoes. The two islands are the surface features of the undersea Barbuda Bank and have karst limestone landscapes. Barbuda is primarily flat and formed from coral reefs. The Middle Miocene Highlands Formation has limestones which are the oldest rocks on the island, rising 120 feet above sea level. The Beazer Formation and the Codrington Formation are both from the Pleistocene and include reef and lagoon related rocks.
References
- 1 2 "Arc and intraplate volcanism in the Spences Bridge Group: Implications for Cretaceous tectonics in the Canadian Cordillera" (PDF). Archived (PDF) from the original on 2019-12-22. Retrieved 2023-05-26.
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