Pali-Aike Volcanic Field (Chile-Argentina)

Status Unknown Eruption -5550 282m
Pyroclastic cone(s) (Subduction zone / Continental crust (> 25 km))

Pali-Aike Volcanic Field

The 3000 km2 Pleistocene-to-Holocene Pali-Aike volcanic field straddles the Chile-Argentina border north of the Straits of Magellan, about 150 km NE of the town of Punta Arenas. The southernmost of the Patagonian basaltic plateau lavas, Pali-Aike contains lake-filled maars and basaltic scoria and spatter cones with associated fresh-looking lava flows. The distribution of maars and cones indicates that eruptions occurred along regional fissures oriented E-W and NW-SE. The earliest eruptions produced maars and associated lava flows that are now exposed only in river valleys. A second stage formed now-eroded spatter cones and soil-covered lava flows. The youngest cones and lava flows are found in the SE part of the field. The most recent volcanic event produced scoria and spatter cones and fresh lava flows not covered by soil. Ejecta covers prehistorical artifacts (Skewes and Stern, 1979).

A lava flow of the Pleistocene-to-Holocene Palei-Aike volcanic field is seen here from Cerro del Diablo. The large volcanic field straddles the Chile/Argentina border north of the Straits of Magellan. The southernmost of the Patagonian basaltic plateau lavas, Palei-Aike contains lake-filled maars and basaltic scoria and spatter cones with associated fresh-looking lava flows.

Photo by Andres Figueroa Zurita (courtesy of Oscar González-Ferrán, University of Chile).

Last updated 2019-08-04 00:28:03

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