Mascota Volcanic Field

sopka – Volcanic field, Mexico, Middle America-Caribbean Volcanic Regions

Kde

Mexico, Middle America-Caribbean Volcanic Regions

Typ (GVP)

Volcanic field

Nadmořská výška

2 525 m

Tektonické prostředí

Subduction zone / Continental crust (> 25 km)

Poloha

20,567°, -104,817°

A group of calc-alkaline andesitic and lamprophyre cinder cones and lava domes, along with associated lava flows, is located near the town of Mascota about 50 km E of Puerto Vallarta. Mascota is the youngest of a group of potassic volcanic fields in extensional grabens of the Jalisco block south of the Río Ameca. Most volcanism here is confined to two NNW-SSE-trending grabens cutting Cretaceous ash-flow tuffs. The youngest eruption was a basaltic andesite lava flow at Volcán Malpaís, north of Mascota; the lack of soil development and sparse vegetation suggest that it may be only a few thousand years old (Carmichael et al., 1996). The field is noted for its unusual diversity of volcanic rocks, and contains Earth's youngest known minettes (lamprophyres).

Text: Smithsonian Global Volcanism Program.

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