Vai al contenuto principale
← Torna alla mappa
⇄ Confronta

Sakar

Stratovulcano · Papua New Guinea · 947 m

The small circular island at the top-center is Sakar, the NE-most of a chain of volcanic islands off the northern coast of Papua New Guinea. The 8 x 10 km wide island, seen in this Space Shuttle image with north to the upper left, is an incised stratovolcano with a summit crater lake. The 50-km-wide island of Umboi, whose left side is cut by a large caldera breached to the NE, fills the center of the image.
The small circular island at the top-center is Sakar, the NE-most of a chain of volcanic islands off the northern coast of Papua New Guinea. The 8 x 10 km wide island, seen in this Space Shuttle image with north to the upper left, is an incised stratovolcano with a summit crater lake. The 50-km-wide island of Umboi, whose left side is cut by a large caldera breached to the NE, fills the center of the image. · Foto: NASA Space Shuttle image STS50-100-D, 1992 (http://eol.jsc.nasa.gov/). · Wikimedia Commons
Tipo
Stratovulcano
Paese
Papua New Guinea
Regione
Southwestern Pacific Volcanic Regions / Bismarck Volcanic Arc
Altitudine
947 m
Coordinate
-5.410, 148.084
Ultima eruzione
Sconosciuto
Contesto tettonico
Subduction zone / Continental crust (> 25 km)
Forma vulcanica
Composite
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

Sakar is an incised stratovolcano with a summit crater lake. Deep valleys cut the flanks of the volcano, which is partially surrounded by coral reefs. An older volcano that forms much of the island consists mainly of porphyritic basaltic rocks. A younger andesitic cone with a 1.5-km-wide crater has been constructed within the larger old crater, whose rim is exposed on the N and E. No eruptions have been reported, but warm springs are found along the SW coast, and a pyroclastic cone on the southern flank of the 8 x 10 km island may be of Holocene age (Johnson, 1990 pers. comm.). A large submarine debris-avalanche deposit lies north of Sakar.

Sintesi da Wikipedia

Riassunto in inglese

Sakar Island is a volcanic island north-west of New Britain in the Bismarck Sea, at 5.416667°S 148.1°E. It is a stratovolcano with a summit crater lake. No recorded eruptions are known.

Wikipedia · CC BY-SA · Leggi l'articolo completo →

Storia delle eruzioni

Cronologia dettagliata

Nessuna registrazione di eruzioni disponibile.

Link esterni

⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.