Descirbe the processes which led to the formation of Soufriere Hills volcano in Montserrat in 1997?

Answer 1

Soufriere Hills Volcano
Location: Montserrat Island
Latitude: 16.72 N
Longitude: 62.18 W
Height: 915 meters (3,010 feet)
Type: Stratovolcano
Latest Eruptions: Current eruption began July 18, 1995, and continues

Soufriere Hills volcano sits on the north flank of the older South Soufriere Hills volcano, located at the south end of Montserrat Island (13 x 8 kilometers). The summit area consists primarily of a series of ESE-trending lava domes. Block-and-ash flow and surge units associated with dome growth predominate in flank deposits. Pyroclastic-flow deposits associated with the formation of English's Crater have been dated at around 19,000 years BP (before present). A series of eruptions dated at 16,000-24,000 years BP pre-dates the Castle Peak dome in the crater by an unknown period of time. English's Crater is breached to the east. Periods of increased seismicity below Soufriere Hills were reported in 1897-98, 1933-37, and again in 1966-67. There were no reported historical eruptions, but some deposits and features have a young appearance. A radiocarbon date of ~320 ± 54 years BP from a northeast-flank pyroclastic-flow deposit is significantly younger than other radiocarbon dates from the volcano, and could have resulted from the latest activity of Castle Peak.

Answer 2

Plate Tectonics: subduction and pyroclastic flows.

Answer 3

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