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Evidence of active subsidence at Basiluzzo island (Aeolian islands, southern Italy) inferred from a Roman age wharf
Language
English
Obiettivo Specifico
4V. Vulcani e ambiente
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/332 (2014)
ISSN
1040-6182
Electronic ISSN
1873-4553
Publisher
Elsevier Science Limited
Pages (printed)
143-150
Issued date
2014
Keywords
Abstract
The Aeolian Arc (Southern Tyrrhenian Sea, Italy) is one of the most active volcanic areas of the Mediterranean
basin, affected by volcanic/hydrothermal and seismic activity. Ancient populations settled this
region since historical times, building coastal installations which currently are valuable archaeological
indicators of relative sea level changes and vertical land movements. In this study we show and discuss
data on the relative sea level change estimated from a submerged wharf of Roman age dated between 50
B.C. and 50 A.D., located at Basiluzzo Island. This structure has been studied through marine surveys and
archaeological interpretations and is presently located at a corrected depth of 4.10 0.2 m. We explain
this submergence by a cumulative effect of the relative sea level change caused by the regional glaciohydro-
isostatic signal, active since the end of the last glacial maximum, and the local volcano-tectonic
land subsidence. Finally, a total subsidence rate of 2.05 0.1 mm/yr 1, with a volcano-tectonic contribution
of 1.43 0.1 mm/yr 1 for the last 2 ka BP, is inferred from the comparison against the latest
predicted sea level curve for the Southern Tyrrhenian Sea, suggesting new evaluations of the volcanotectonic
hazard for this area of the Aeolian islands.
basin, affected by volcanic/hydrothermal and seismic activity. Ancient populations settled this
region since historical times, building coastal installations which currently are valuable archaeological
indicators of relative sea level changes and vertical land movements. In this study we show and discuss
data on the relative sea level change estimated from a submerged wharf of Roman age dated between 50
B.C. and 50 A.D., located at Basiluzzo Island. This structure has been studied through marine surveys and
archaeological interpretations and is presently located at a corrected depth of 4.10 0.2 m. We explain
this submergence by a cumulative effect of the relative sea level change caused by the regional glaciohydro-
isostatic signal, active since the end of the last glacial maximum, and the local volcano-tectonic
land subsidence. Finally, a total subsidence rate of 2.05 0.1 mm/yr 1, with a volcano-tectonic contribution
of 1.43 0.1 mm/yr 1 for the last 2 ka BP, is inferred from the comparison against the latest
predicted sea level curve for the Southern Tyrrhenian Sea, suggesting new evaluations of the volcanotectonic
hazard for this area of the Aeolian islands.
Type
article
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