Tacana (Mexico-Guatemala)

Status Unknown Eruption 1986 4064m
Stratovolcano (Subduction zone / Continental crust (> 25 km))

Tacana

Tacaná is a 4064-m-high composite stratovolcano that straddles the México/Guatemala border at the NW end of the Central American volcanic belt. The volcano rises 1800 m above deeply dissected plutonic and metamorphic terrain. Three large calderas breached to the south, and the elongated summit region is dominated by a series of lava domes intruded along a NE-SW trend. Volcanism has migrated to the SW, and a small adventive lava dome is located in the crater of the youngest volcano, San Antonio, on the upper SW flank. Viscous lava flow complexes are found on the north and south flanks, and lobate lahar deposits fill many valleys. Radial drainages on the Guatemalan side are deflected by surrounding mountains into the Pacific coastal plain on the SW side of the volcano. Historical activity has been restricted to mild phreatic eruptions, but more powerful explosive activity, including the production of pyroclastic flows, has occurred as recently as about 1950 years ago.

Tacaná is a 4060-m-high composite stratovolcano that straddles the México/Guatemala border at the far NW end of the Central American volcanic belt. The volcano is seen here from the ENE, on the Guatemalan side of the border, where it rises steeply above a 9-km-wide caldera surrounded by deeply dissected plutonic rocks. Historical activity at Tacaná has been restricted to mild phreatic eruptions, but more powerful explosive activity, including the production of pyroclastic flows, has been documented in prehistorical time.

Photo by Bill Rose, 1986 (Michigan Technological University).

Last updated 2019-08-03 19:28:03

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Volcano Mexico-Guatemala