Ecuador · Shield volcano
Santiago Island
Santiago
- Type
- Shield volcano
- Elevation
- 920m
- Last eruption
- 1906
- Type
- Shield volcano
- Country
- Ecuador
- Region
- Eastern Pacific / Galapagos Hotspot Volcano Group
- Elevation
- 920m
- Coordinates
- -0.220, -90.770
- Last eruption
- 1906
- Tectonic setting
- Rift zone / Oceanic crust (< 15 km)
- Landform
- Shield
- Major rock type
- Basalt / Picro-basalt
Geological summary
The elongated shield volcano of Santiago Island, also known as San Salvador Island or James Island, has numerous scattered Holocene pyroclastic cones. Fresh-looking lava flows from these cones cover the flanks. The summit ridge, lined with a chain of NW-trending cinder and spatter cones, is located at the NW end of the island. Prominent flank tuff cones occur at the western and eastern coasts. The most recent activity has been concentrated at the NW and SE ends of the island. The pahoehoe lava flows at James and Sullivan Bays, on opposite ends of the island, were erupted in the past few hundred years. The James Bay flows were dated by fragments of marmalade pots left by buccaneers in 1684 that were subsequently embedded in the lava flows described by Charles Darwin in 1835.
From Wikipedia
Santiago Island is one of the Galápagos Islands. The island, which consists of two overlapping volcanoes, has an area of 585 square kilometers (226 mi2) and a maximum altitude of 907 meters (2,976 ft), atop the northwestern shield volcano. The volcano in the island's southeast erupted along a linear fissure and is much lower. The oldest lava flows on the island date back to 750,000 years ago.
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Eruption history
3 recordedGlossaryDetailed timeline
- 1904VEI 0Observed1904-07-02 – 1906-12-15SE flank
- 1897VEI 0Observed1897-07-02 – end unknownSE flank (Sullivan Bay?)
- 1759 (±75 yrs)VEI ?Geological estimate1759 – end unknownWest flank (James Bay)
Nearby volcanoes
External links
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