Ecuador · Stratovolcano
Sumaco
- Type
- Stratovolcano
- Elevation
- 3990m
- Last eruption
- 1895
- Type
- Stratovolcano
- Country
- Ecuador
- Region
- South America / Northern Andean Volcanic Arc
- Elevation
- 3990m
- Coordinates
- -0.538, -77.626
- Last eruption
- 1895
- Tectonic setting
- Subduction zone / Continental crust (> 25 km)
- Landform
- Composite
- Major rock type
- Trachybasalt / Tephrite basanite
Geological summary
The forested Sumaco stratovolcano rises above the jungles of the western Amazon basin, east of Antisana volcano, and occupies an isolated position far to the east of the main Andes volcanic axis. Constructed over Cretaceous sedimentary rocks, it forms a relatively symmetrical cone in an area of heavy rainfall and erosion. Sumaco has produced alkaline tephritic, basanitic, and phonolitic rocks distinct from those of the main Andean chain. The volcano has a broad summit crater, 300 x 400 m wide, containing a central cone. Reports of historical eruptions are somewhat ambiguous; an eruption is inferred in the 18th or early-19th century on the basis of changes in crater morphology.
From Wikipedia
Sumaco is a symmetrical, isolated stratovolcano, that is set off from the main Ecuador volcanic axis. Its rocks are very distinct from those from most Andean volcanoes because of its lack of andesitic composition, in favour of basanite and phonolitic rock. Sumaco is heavily forested and contains a small cone in its broad summit crater. An historical eruption occurred around 1895.
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Eruption history
3 recordedGlossaryDetailed timeline
- 1933VEI 2Method not stated1933-02-16 – end unknown
- 1895 (±30 yrs)VEI 2Observed1895-07-02 – end unknown
- 1650 (±50 yrs)VEI 3Method not stated1650 – end unknown
Nearby volcanoes
External links
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