Stati Uniti · Stratovulcano
Monte Adams
Adams
- Tipo
- Stratovulcano
- Altitudine
- 3742 m
- Ultima eruzione
- 950
- Tipo
- Stratovulcano
- Paese
- Stati Uniti
- Regione
- Nord America / High Cascades Volcanic Arc
- Altitudine
- 3742 m
- Coordinate
- 46.206, -121.490
- Ultima eruzione
- 950
- Contesto tettonico
- Zona di subduzione / Crosta continentale (> 25 km)
- Forma vulcanica
- Composito
- Roccia principale
- Andesite / Andesite basaltica
Sintesi geologica
The andesitic-dacitic Mount Adams stratovolcano is second in volume only to Mount Shasta in the Cascade Range. The volcanic complex is elongated along a NNW-SSE line, and includes more than 60 flank vents over 200 km2. Volcanism began about 940 ka, with three main cone-building stages occurring at about 500, 450, and 30 ka. It was active throughout the Holocene, producing two dozen minor explosive eruptions from summit and flank vents. Six Holocene lava flows are located on the flanks between 2,100 and 2,600 m elevation. The most voluminous Holocene lava flows, some of which traveled 10 km or more, were emplaced between about 7,000 and 4,000 years ago. The latest eruption about 1,000 years ago produced a minor tephra layer and possibly a small lava flow down the E flank.
Sintesi da Wikipedia
Riassunto in ingleseMount Adams is a stratovolcano located in the Cascade Range of Washington, United States. Standing at 12,276 ft (3,742 m) feet, it is the second-highest mountain in Washington and a prominent feature within the Cascade Volcanic Arc, which formed as a result of the subduction of the Juan de Fuca Plate beneath the North American Plate. Adams is near two more-frequently erupting neighbors, Mount St Helens and Mount Rainier. It has twelve named glaciers descending its slopes.
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Storia delle eruzioni
15 registrateGlossarioCronologia dettagliata
- 950VEI 2Stima geologica950 – fine sconosciutaEast flank?
- 200VEI 2Stima geologica200 – fine sconosciuta
- 300 a.C.VEI 2Stima geologica300 a.C. – fine sconosciuta
- 400 a.C.VEI 2Stima geologica400 a.C. – fine sconosciuta
- 550 a.C. (±1000 anni)VEI 2Stima geologica550 a.C. – fine sconosciuta
- 1850 a.C.VEI 1Stima geologica1850 a.C. – fine sconosciutaSSE flank (2100 m)
- 2650 a.C. (±300 anni)VEI 2Stima geologica2650 a.C. – fine sconosciuta
- 2950 a.C. (±100 anni)VEI 1Stima geologica2950 a.C. – fine sconosciutaSSE flank (2600 m)
- 3250 a.C. (±300 anni)VEI 2Stima geologica3250 a.C. – fine sconosciuta
- 3550 a.C.VEI 2Stima geologica3550 a.C. – fine sconosciuta
- 3800 a.C. (±1950 anni)VEI 1Stima geologica3800 a.C. – fine sconosciutaNNE flank (2100-2250 m)
- 4050 a.C. (±500 anni)VEI 2Stima geologica4050 a.C. – fine sconosciutaUpper SW flank?
- 4550 a.C.VEI 2Stima geologica4550 a.C. – fine sconosciutaNW flank (2200-2400 m)
- 5150 a.C. (±500 anni)VEI 2Stima geologica5150 a.C. – fine sconosciuta
- 7050 a.C. (±1000 anni)VEI 2Stima geologica7050 a.C. – fine sconosciuta
Vulcani nelle vicinanze
Link esterni
⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.