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The post-Tyrrhenian evolution in Sardinia: evidence from Ebidozzi palaeovalley (Argentiera, North-Western Sardinia, Italy)

Ginesu, Sergio and Derudas, Alessandro and Enzo, Stefano and Secchi, Francesco and Sias, Stefania (2009) The post-Tyrrhenian evolution in Sardinia: evidence from Ebidozzi palaeovalley (Argentiera, North-Western Sardinia, Italy). Geografia fisica e dinamica quaternaria, Vol. 32 (1), p. 23-30. eISSN 1724-4781. Article.

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Analyses of selected samples coming from a well exposed plio-pleistocenic stratigraphic section located along the coastline of northwestern Sardinia, allow us to evaluate the recent geomorphological evolution of a sector belonging to an ancient valley infilled by sedimentary deposits, mainly of continental environment. The palaeovalley filling has been favored by erosional processes in post-Tyrrhenian regression times under climate exchange recorded during Holocene. The occurrence of halite mineral phase in the studied stratigraphic sequence, suggests the prolonged occurrence of salt environments during the early phase of post-Tyrrhenian regression before the begin of an aeolian regime. Assuming a uniform erosive process for the last 80 Ka, we evaluate its the efficiency on the basis of the volume of deposits infilling the investigated palaeovalley. The obtained deposition rate is about 0.5 m3/year.

Item Type:Article
ID Code:4512
Uncontrolled Keywords:Coast evolution, Italy, Sardinia, Tyrrhenian-Holocene
Subjects:Area 04 - Scienze della terra > GEO/04 Geografia fisica e geomorfologia
Area 03 - Scienze chimiche > CHIM/02 Chimica fisica
Area 04 - Scienze della terra > GEO/07 Petrologia e petrografia
Divisions:001 Università di Sassari > 01 Dipartimenti > Scienze botaniche, ecologiche e geologiche
001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Comitato glaciologico italiano
Deposited On:07 Sep 2010 15:58

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