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Submarine pyroclastic deposits formed at the Soufriere Hills Volcano, Montserrat (1995-2003); what happens when pyroclastic flows enter the ocean?

J. Trofimovs, L. Amy, G. Boudon, C. Deplus, E. Doyle, N. Fournier, M. B. Hart, J. C. Komorowski, A. Le Friant, E. J. Lock, C. Pudsey, G. Ryan, R. S. J. Sparks and P. J. Talling
Submarine pyroclastic deposits formed at the Soufriere Hills Volcano, Montserrat (1995-2003); what happens when pyroclastic flows enter the ocean?
Geology (Boulder) (July 2006) 34 (7): 549-552

Abstract

The Soufriere Hills volcano, Montserrat, West Indies, has undergone a series of dome growth and collapse events since the eruption began in 1995. Over 90% of the pyroclastic material produced has been deposited into the ocean. Sampling of these submarine deposits reveals that the pyroclastic flows mix rapidly and violently with the water as they enter the sea. The coarse components (pebbles to boulders) are deposited proximally from dense basal slurries to form steep-sided, near-linear ridges that intercalate to form a submarine fan. The finer ash-grade components are mixed into the overlying water column to form turbidity currents that flow over distances >30 km from the source. The total volume of pyroclastic material off the east coast of Montserrat exceeds 280X10 (super 6) m (super 3) , with 65% deposited in proximal lobes and 35% deposited as distal turbidites.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 34
Serial Issue: 7
Title: Submarine pyroclastic deposits formed at the Soufriere Hills Volcano, Montserrat (1995-2003); what happens when pyroclastic flows enter the ocean?
Affiliation: University of Bristol, Department of Earth Sciences, Bristol, United Kingdom
Pages: 549-552
Published: 200607
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 11
Accession Number: 2006-058815
Categories: Quaternary geology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: sects., sketch maps
N16°30'00" - N16°49'60", W62°15'00" - W61°55'00"
Secondary Affiliation: Institut de Physique du Globe de Paris, FRA, FranceUniversity of the West Indies, TTO, Trinidad and TobagoUniversity of Plymouth, GBR, United KingdomBritish Antarctic Survey, GBR, United Kingdom
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200632
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