Skip to Main Content
Skip Nav Destination

ABSTRACT

Large-scale correlations and sequence stratigraphic analyses have been carried out in the central Mediterranean region, a tectonically active area crossing the extensional margin of the southern Tyrrhenian, the compressional front of the Siculo-Maghrebian Tertiary chain and the North African foreland. The Plio-Pleistocene marine record has been subdivided in sequences and systems tracts on the basis of both original data and correlations. We provide seismic, well-log and outcrop data supporting the occurrence of regional unconformities of constant age, related to glacio-eustatic oscillations. Evidence of transgressive-regressive facies cycles having different orders of duration, major erosional truncations and basin starvation events contributed to the construction of a new sea-level cycle chart based on the available Mediterranean high-resolution biochronology and magnetostratigraphy. We largely used the deep-sea correlative conformities of sequence boundaries in order to improve the age calibration of the cycle chart. The chart, based on a new Plio-Pleistocene time scale, can resolve boundary ages up to 5th-order paracycles based on correlations to the high-frequency oscillations of the deep-sea record. Outcrop evidence of correlations between individual parasequences and 41 ky astronomical and climatic oscillations of the deep-sea record is supported by high-resolution biochronology. A comparison with the Mediterranean Plio-Pleistocene sequence chart confirms the general validity of the Gulf of Mexico cycle chart of Wornardt and Vail (1991), except for minor differences in age and number of 4th-order sequences.

The sequence stratigraphic subdivisions are recognizable even in active sectors where stratal analysis separates the eustatic from the tectonic component; from this perspective, our experience support the regional synchroneity of sequences and systems tracts occurring in the studied interval independently of local tectonic factors.

You do not currently have access to this chapter.

Figures & Tables

Contents

GeoRef

References

Related

Citing Books via

Close Modal

or Create an Account

Close Modal
Close Modal