Publication Date:
2017-04-04
Description:
This paper documents a phreatomagmatic ¯ank eruption that
occurred 18 700 100 a BP, on the lower north-eastern slope
of Etna during the Ellittico volcano activity, which produced fall
and surge deposits. This type of eruption is connected to a
sedimentary basement ridge at Etna. The interaction between
the rising magma and the shallow groundwater hosted in the
volcanic pile overlying the impermeable sediments resulted in
phreatomagmatic instead of strombolian activity. Three eruptive
phases are distinguished based on ®eld and analytical data:
(i) an explosive phreatomagmatic opening, (ii) a main phase
producing coarse lithic-rich fallout and a strombolian deposit,
and (iii) the ®nal pulsating surge-forming phase. The discovery
of this phreatomagmatic ¯ank eruption, which occurred at
lower altitude, raises important issues for previous hazard
assessments at Etna.
Description:
University of Catania
Description:
Published
Description:
235-240
Description:
3.5. Geologia e storia dei sistemi vulcanici
Description:
JCR Journal
Description:
reserved
Keywords:
Etna
;
phreatomagmatic eruption
;
hazard assessment
;
05. General::05.02. Data dissemination::05.02.03. Volcanic eruptions
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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