The entrance of pyroclastic flows into the sea I. oceanographic and geologic evidence from dominica, lesser antilles
Date of Original Version
The submarine counterparts of late Quaternary subaerial pyroclastic flow deposits off the western flanks of Dominica, Lesser Antilles, have been investigated by 3.5 kHz seismic profiling and dredging (cruise EN20 of R/V "Endeavor"). Block-and-ash flow deposits formed by dome collapse and a welded ignimbrite from a prominent fan at Grande Savanne, Dominica. This fan can be traced underwater as a major constructional ridge (2-4 km wide and 200-400 m thick) to over 13 km offshore at a water depth of 1800 m. The submarine ridge has a volume of 14 km3 and has the characteristic morphology of a debris flow apron composed of several individual units. The evidence suggests that pyroclastic flows can move underwater without losing their essential character. © 1980.
Publication Title, e.g., Journal
Journal of Volcanology and Geothermal Research
Sparks, R. S.J., H. Sigurdsson, and S. N. Carey. "The entrance of pyroclastic flows into the sea I. oceanographic and geologic evidence from dominica, lesser antilles." Journal of Volcanology and Geothermal Research 7, 1-2 (1980). doi: 10.1016/0377-0273(80)90021-9.