West java, Perbakti-Gagak Volcano

Written by on July 30, 2012 in Java Mountains with 0 Comments

West java, Perbakti-Gagak Volcano

http://www.volcano.si.edu/world/volcano.cfm?vnum=0603-04=

Perbakti-Gagak

Country: Indonesia

Subregion Name: Java (Indonesia)

Volcano Number: 0603-04=

Volcano Type: Stratovolcanoes

Volcano Status: Historical

Last Known Eruption: 1939 

Summit Elevation: 1699 m 5,574 feet

Latitude: 6.75°S 6°45’0″S

Longitude: 106.70°E 106°42’0″E

The Perbakti-Gagak volcanic complex, also known as Kiaraberes-Gagak, is a cluster of deeply eroded stratovolcanoes situated immediately SW of Salak volcano. The 1699-m-high summit ridge of Gunung Perbakti is elongated in a NW-SE direction, and Gunung Endut volcano rises to 1474 m above a saddle SW of Perbakti. Gunung Gagak lies to the NW; it is capped by pumice and obsidian, and obsidian lava flows extend to the north and NE. Quaternary rhyolitic lava domes form a NNE-trending chain at the eastern side of the complex. Two 2-km-wide depressions on the northern and southern sides of Perbakti form the headwaters of the Kaluwung Herang and Pamatutan rivers, respectively. The volcanic complex is marked by vigorous geothermal activity. Fumaroles, mud pots and hot springs are located on the south and SE flanks of Perbakti and at the Kiaraberes area, which includes the commercial geothermal field of Awibengkok. Mild phreatic eruptions took place during the Holocene into historical time from flank fumarolic fields.

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