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Jocotitlán VulkanSchichtvulkan 3900 m / 12,795 ft
Central Mexico, 19.72°N / -99.76°W Aktueller Status: nicht aktiv (1 von 5)
Typische Aktivität: effusive and explosive
Ausbrüche des Jocotitlán: 1270 AD ± 75, 7740 BC ± 75 years (radiocarbon-dated) Letzte Erdbeben in der Nähe:
Jocotitlán volcano belongs to the Trans Mexican Volcanic Belt, which extends in W-E direction over 1500 km from the Pacific Coast to the Gulf of Mexico. The latest known eruption occurred about 700 years ago and produced block-and-ash flows and pyroclastic surges. Beschreibung:Jocotitlán is an isolated composite volcano that rises 1300 m above the Toluca basin. The 3900-m-high volcano was constructed during the Pleistocene and mainly consists of andesitic-to-dacitic lava flows.A major obsidian-bearing dacitic plinian eruption was followed by the emplacement of a dacitic lava-dome complex, accompanied by lava effusion, pumice-fall eruptions, and pyroclastic surges. The most prominent feature of Jocotitlán volcano is a horseshoe-shaped escarpment open to the NE that formed as a result of gravitational failure of the summit during the early Holocene. The resulting debris-avalanche deposit covers an 80 sq km area to the NE. Lava dome emplacement accompanied by pyroclastic flows and surges subsequently filled much of the avalanche scarp. --- Source: GVP, Smithsonian Institution |
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