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Country: | Ecuador | |
| Subregion Name: | Galápagos Islands | ||
| Volcano Number: | 1503-08= | ||
| Volcano Type: | Shield volcano | ||
| Volcano Status: | Historical | ||
| Last Known Eruption: | 1991 | ||
| Summit Elevation: | 343 m | 1,125 feet | |
| Latitude: | 0.33°N | 0°20'0"N | |
| Longitude: | 90.47°W | 90°28'0"W | |
| The low shield volcano forming Marchena Island contains one of the largest calderas of the Galápagos Islands. In contrast to other Galápagos volcanoes, the 6 x 7 km caldera and its outer flanks have been largely buried by a cluster of pyroclastic cones and associated lava flows. Its first historical eruption occurred in 1991. Other young lava flows, some of which may be only a few thousand, or even a few hundred years old, filled the caldera and flowed down its outer forested flanks, in some cases to the sea. | |||
