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Chilcotin Group-North volcano

Volcanic field 1800 m / 5906 ft
Canada, 51.45°N / -122.33°W
Current status: (probably) extinct (0 out of 5) | Reports
Chilcotin Group-North volcano books
Typical eruption style: unspecified
Chilcotin Group-North volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene) No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

The Chilcotin basalts form an extensive series of flat-lying basaltic lava flows of Miocene to Pleistocene age covering the interior of British Columbia (Mathews, 1989). The flow remnants form eroded volcanic outcrops that appear to have been erupted from now-eroded coalescing small shield volcanoes scattered throughout the intermontaine region. Most flows are 5-10 m thick, but locally are very thick (up to 200 m) where they fill palaeovalleys. In some instances thick sequences of pillows are found, in other localities they form a thin veneer under glacial drift. The Chilcotin basalts are listed here in two groups--a northern group in the Chilcotin Plateau area, and a southern group in the Thompson Plateau. Eroded volcanic outcrops of Pleistocene age of the northern Chilcotin group are found at Alixton Creek, Big Bar, Browns Lake, Crows Bar, Dog Creek, Prentice Gulch, and Thaddeus Lake (Hickson et al., 1994).
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Source: Smithsonian / GVP volcano information


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