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Palaeoseismic event in the Bronze Age in northern Sardinia (Italy) evidences from megalithic monuments

Ginesu, Sergio and Russo, Fiammetta and Secchi, Francesco and Sias, Stefania and Carboni, Donatella (2008) Palaeoseismic event in the Bronze Age in northern Sardinia (Italy) evidences from megalithic monuments. Bulletin of the Geological Society of Greece = Δελτio Eλληvιkής Γεωλoγιkής Eταιρiας, Vol. 42 (2), p. 68-73. ISSN 0438-9557. Article.

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Megalithic monuments of northern Sardinia, referable to the Copper and Bronze age, are used to test the hypothesis that the observed building damage is of seismogenic nature. For this purpose have been analysed 100 megalithic sites covering an area of about 500 Km2 occurring in an area geologically characterized by very low seismic activity and located in the horst shoulders made up of Palaeozoic basement at the edge of Oligo-Miocene Logudoro basin. Observed monuments show structural damage including torsion of top block in rock-cut tombs (the so called “Domus de Janas”), horizontal displacement of ashlars and collapse orientation in nuraghs. Observed collapses of nuraghs show a maximum of frequency around N, indicating a possible palaeosismicity activity. The proposed interpretation is in agreement with the occurrence of recentmost volcanic activity of Plio-Pleistocene anorogenic cycle ending at about 0.5 Ka as well as the distribution of seismic events in historical times.

Item Type:Article
ID Code:7138
Uncontrolled Keywords:Recentmost volcanism, palaeosismicity, megalithic monuments, Sardinia
Subjects:Area 04 - Scienze della terra > GEO/04 Geografia fisica e geomorfologia
Area 11 - Scienze storiche, filosofiche, pedagogiche e psicologiche > M-GGR/01 Geografia
Divisions:001 Università di Sassari > 01 Dipartimenti > Teorie e ricerche dei sistemi culturali
001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
Publisher:Geological Society of Greece
Deposited On:20 Feb 2012 13:54

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