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Volcán Poike

Rapa Nui

Volcán en escudo · Chile · 501 m

Waves lap against the northern coast of Easter island.  This view looks from Obahe to Mahatua with Volcán Poike, a shield volcano forming the eastern tip of the island, on the horizon.  The trachytic lava domes of Tea-Tea are the small peaks on the left horizon.  The triangle-shaped Easter Island, renowned for its dramatic megalithic statues of hand-carved basalt, sits atop the Sala y Gómez submarine ridge, which trends eastward from the East Pacific Rise.  The island is composed of three principal volcanoes, Poike, Rano Kau, and Terevaka.
Waves lap against the northern coast of Easter island. This view looks from Obahe to Mahatua with Volcán Poike, a shield volcano forming the eastern tip of the island, on the horizon. The trachytic lava domes of Tea-Tea are the small peaks on the left horizon. The triangle-shaped Easter Island, renowned for its dramatic megalithic statues of hand-carved basalt, sits atop the Sala y Gómez submarine ridge, which trends eastward from the East Pacific Rise. The island is composed of three principal volcanoes, Poike, Rano Kau, and Terevaka. · Foto: Photo by Oscar González-Ferrán (University of Chile). · Wikimedia Commons
Tipo
Volcán en escudo
País
Chile
Región
Southern Pacific Volcanic Regions / Salas y Gómez Ridge Volcano Group
Altitud
501 m
Coordenadas
-27.114, -109.356
Última erupción
Desconocido
Contexto tectónico
Rift zone / Oceanic crust (< 15 km)
Forma volcánica
Shield
Roca principal
Basalt / Picro-Basalt
Resumen geológico

The triangular Rapa Nui (also known as Isla de Pascua, or Easter Island), is renowned for its dramatic megalithic statues of hand-carved basalt. The island sits atop the largely submarine Salas y Gómez Ridge, which trends eastward from the East Pacific Rise. It is composed of three principal volcanoes and more than 70 subsidiary vents. Rano Kau at the SW tip includes flat-bottomed crater 1.5 km wide, while Poike volcano is at the E point; both are of Pleistocene age. Terevaka is a broad shield volcano of Pliocene-to-Pleistocene age at the northern point of the island, which is capped by many pyroclastic cones; the last stage of activity consisted of eruptions from multiple rift zones. The latest lava flows, at Hiva-Hiva near the west-central coast, are thought to be less than 2,000 years old.

Resumen de Wikipedia

El volcán Poike es un volcán inactivo ubicado en Isla de Pascua, en su extremo este. Forma uno de los tres grandes conos que constituyen la superficie de la isla. Tiene una forma cónica simple y alcanza una altitud de cuatrocientos doce metros sobre el nivel del mar. Es el volcán más antiguo de la isla, ya que según estimaciones habría surgido desde el fondo marino tras dos erupciones, la primera de ellas ocurrida hace alrededor de tres millones de años y la segunda hace unos novecientos mil años. En la ladera norte de este volcán se hallan tres montículos de tamaño menor llamados Maʻunga Vai a Heva, Maʻunga Tea-Tea y Maʻunga Parehe.

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Enlaces externos

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