Piedra Grande

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

Kde

Guatemala, Middle America-Caribbean Volcanic Regions

Typ (GVP)

Stratovolcano(es)

Nadmořská výška

1 640 m

Poloha

14,250°, -90,400°

A cluster of faulted, heavily eroded andesitic stratovolcanoes is located in the Tecuamburro graben, between the Jalpatagua fault and Tecuamburro volcano. The vent area of Piedra Grande, on the north, lies with 4-km-wide, nested depressions open to the east. Much of the upper part of the andesitic volcano is extensively hydrothermally altered, and a fumarole is present. To the south is El Sordo, a basaltic andesite stratovolcano with a smaller depression breached to the ESE. One lava flow has a Potassium-Argon age of 1.180 +/- 0.080 million years (Ma). To the south the Piedra Grande complex interfingers with El Sordo, an eroded and faulted basaltic cone. To the SW is Los Sitios, a sequence of interfingering andesitic lava flows from two eroded and faulted scoria and cinder cones. One flow has a Potassium-Argon age of 0.800 +/- 0.061 Ma.

Text: Smithsonian Global Volcanism Program.

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