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San Sebastian Volcanic Field volcano

Pyroclastic cone(s) 1780 m / 5840 ft
Mexico, 20.83°N / -104.82°W
Current status: (probably) extinct (0 out of 5) | Reports
San Sebastian Volcanic Field volcano books
Typical eruption style: unspecified
San Sebastian Volcanic Field volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene) No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

The San Sebastián volcanic field, near the old silver-mining town of San Sebastián, is the northernmost of a belt of potassic volcanic fields located west of the main volcanic chain of western México. These geochemically unusual volcanoes owe their existence to their location at the conjunction of tectonic regimes involving the rifting of the Jalisco tectonic block and the subduction of the Rivera plate. The San Sebastián volcanic field consists of a group of scattered lamprophyric cinder cones erupted predominately through silicic ash-flow tuffs of the southern Sierra Madre Occidental province. The cinder cones and related lava flows, which erupted in a rugged and sparsely populated mountainous area that makes access difficult, range in age from 0.48 to 0.26 million years.
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Source: Smithsonian / GVP volcano information


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