Physics
Scientific paper
Sep 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.3393r&link_type=abstract
Geophysical Research Letters, Volume 25, Issue 18, p. 3393-3396
Physics
7
Volcanology: Atmospheric Effects, Volcanology: Eruption Mechanisms, Volcanology: Eruption Monitoring, Volcanology: General Or Miscellaneous
Scientific paper
The stratigraphy of the Soufriere Hills volcano is dominated by dense-andesite block and ash flow deposits. Forty-one radiocarbon ages permit a reconstruction of the eruptive history over the past 31,000 years. A single stratigraphic member yielding radiocarbon ages of 22,000 to 20,000 years B.P. is composed of block and ash flow deposits with semi-vesiculated clasts concentrated in the upper third of each deposit. The present eruption is also producing block and ash flow deposits with both dense and semi-vesiculated clasts. It marks a return to a more explosive driven type of activity as occurred 22,000 to 20,000 years ago. Deposits of this member have a broad sheet-like form and volumes in excess of any produced so far by the present eruption.
Roobol M. J.
Smith Leonard A.
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