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Table of Contents


Vol. 9 - 2010

Vol. 8 - 2009

Vol. 7 - 2008
SP 1 - 2008

Vol. 6 - 2007
Vol. 5 - 2006
Vol. 4 - 2005
Vol. 3 - 2004
Vol. 2 - 2003
Vol. 1 - 2001-2002

Notes for Authors
(PDF - 80 kb)



GeoActa Special Publication 1 2008


Acquisto online

GeoActa
an international Journal of Earth Sciences



Alessandro Amorosi, Marianna Ricci Lucchi, Stefano Claudio Vaiani, Silvia Prandin
Dipartimento di Scienze della Terra e Geologico-Ambientali, Università di Bologna,. Piazza Porta S. Donato 1, 40126 Bologna, Italy.
Giovanni Sarti
Dipartimento di Scienze della Terra, University of Pisa, Via S. Maria 53, 56126 Pisa, Italy
Antonio Muti
A.S.A. Val di Cornia, Via del Molino di Fondo 12, 57029 Venturina (Livorno), Italy

Late Quaternary sedimentary evolution of the Piombino alluvial plain (western Tuscany) as revealed by subsurface data


Volume 3, 2004, pages 97-106

Abstract

Integrated sedimentological and micropalaeontological analysis of a 105 m long core (Vignarca) from the Piombino alluvial plain, in western Tuscany, provides evidence for a Late Quaternary transgressive event within a monotonous vertical succession of alluvial plain deposits. This transgressive pulsation, recorded in the core at about 20 m depth and assigned to > 43 ka on the basis of radiocarbon dating, is documented at Vignarca (3 km landward of present shoreline), through identification of a lagoonal/bay facies association, about 3 m thick, bearing a diagnostic brackish-water microfauna.
Pollen data show a close relationship between initial transgression and the development of mixed Mediterranean and broadleaved forest vegetation, indicating that transgression took place at the onset of a warm (interglacial) period, replacing the previous cold-climate (late glacial) vegetation. Comparison of pollen spectra from core Vignarca with coeval pollen series from the Mediterranean area suggests an age attribution of this transgressive episode to the Tyrrhenian (OIS 5e) transgressive event.

Keywords: Stratigraphy, Pollen, Piombino alluvial plain, Tuscany, Quaternary.