San Sebastian Volcanic Field

sopka (bez známé erupce za posledních ~12 000 let), Mexico, Middle America-Caribbean Volcanic Regions

Kde

Mexico, Middle America-Caribbean Volcanic Regions

Typ (GVP)

Pyroclastic cone(s)

Nadmořská výška

1 780 m

Poloha

20,830°, -104,820°

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 are at the conjunction of tectonic regimes involving the rifting of the Jalisco tectonic block and the subduction of the Rivera plate. The 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.

Text: Smithsonian Global Volcanism Program.

Údaje o sopce: Smithsonian Global Volcanism Program. Další sopky a průduchy.