GeoSed - Associazione Italiana per la Geologia del Sedimentario
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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


Bruno D'Argenio1, Vittoria Ferreri1-2, Sabrina Amodio2-3
1Dipartimento di Scienze della Terra, Università degli Studi di Napoli "Federico II", Largo San Marcellino 10, 80138 Napoli, Italy. E-mail: ferreri@unina.it
2
Istituto per l'Ambiente Marino Costiero, CNR, Calata Porta di Massa, Porto di Napoli, 800133 Napoli, Italy. E-mail: b.dargenio@iamc.cnr.it
3Dipartimento di Scienze per l'Ambiente, Università degli Studi Parthenope, Centro Direzionale, isola C4, 80143 Napoli, Italy. E-mail: sabrina.amodio@uniparthenope.it

Sequence stratigraphy of Cretaceous carbonate platforms: a cyclostratigraphic approach



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Abstract

Textures and early diagenetic features of Cretaceous carbonate platform deposits from central and southern Italy have been analyzed at centimetre to decimetre scale, along well exposed outcrops and in bore cores. The studied sections, despite lack of evident progradational and retrogradational geometries, show systematic variations in facies and bed thickness that evidence cyclic environmental oscillations. A hierarchy of cycles (elementary cycles, bundles and superbundles) has been recognized. Eustatic-climatic, high-frequency changes, linked to the Earth’s orbital perturbations, are considered at the origin of this hierarchy, where the elementary cycles record the precession and/or the obliquity periodicities, and the bundles and superbundles record the short- and long-eccentricity, respectively. These orbital cycles are superimposed on lower-frequency cycles (Trangressive/Regressive Facies Trends, T/RFTs), commonly made up of 2-5 superbundles.
In a sequence stratigraphy approach, the superbundles and the T/RFTs have been interpreted in terms of depositional sequences and used for high-resolution, long-distance (regional- to supraregional) correlation, as well as to assemble orbital chronostratigraphic diagrams that quantify the minimum time required for each succession to stack up.
The chronostratigraphic correlation carried out in central-southern Italy allowed us to show that the sedimentary record of the analyzed sequences may be considered quasi-continuous, at least at superbundle level, and to suggest numerical estimates for the time duration of the discussed intervals.

Keywords: Cyclostratigraphy, Sequence stratigraphy, High-resolution correlation, Orbital chronostratigraphy.