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Piedra Grande volcano

Stratovolcano(es) 1640 m / 5381 ft
Guatemala, 14.25°N / -90.4°W
Current status: (probably) extinct (0 out of 5) | Reports
Piedra Grande volcano books
Typical eruption style: unspecified
Piedra Grande volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene) No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

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.
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Source: Smithsonian / GVP volcano information


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