Carbonate ramp evolution during the Late Oligocene (Chattian), Salento Peninsula, southern Italy

Pomar, Luis; Mateu‐Vicens, Guillem; Morsilli, Michele; Brandano, Marco

doi:10.1016/j.palaeo.2014.03.023

Cited by 70 publications

(55 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Abundant large and flat Eulepidina thrived in the deeper part of the oligophotic zone (Pomar et al 2014). The presence of argillaceousmarly sediment and abundance of planktonic taxa suggest somewhat deeper conditions.…”

Section: Facies Analysismentioning

confidence: 97%

Depositional architecture and sequence stratigraphy of the Oligo–Miocene Asmari platform; Southeastern Izeh Zone, Zagros Basin, Iran

Shabafrooz

Mahboubi

Vaziri‐Moghaddam

et al. 2014

Facies

View full text Add to dashboard Cite

from NE to SW. These progradations are evidenced in the Rupelian and lower Chattian by major changes in facies and stratal architectures, whereas such complex geometries are not observed in the upper Chattian and lower Miocene carbonates, since only platform-top facies are exposed and there are no outcrops of the platform margin. Comparison of the proposed depositional sequences with those reported in the Dezful Embayment and adjacent areas suggests a correlation with the global sea-level curve.

show abstract

Section: Facies Analysismentioning

confidence: 97%

Depositional architecture and sequence stratigraphy of the Oligo–Miocene Asmari platform; Southeastern Izeh Zone, Zagros Basin, Iran

Shabafrooz

Mahboubi

Vaziri‐Moghaddam

et al. 2014

Facies

View full text Add to dashboard Cite

show abstract

“…This unit represents a fringing reef complex and shows a very well-preserved lateral zonation of the reef subenvironments (Bosellini and Russo, 1992;Parente, 1994). The sampled section shows clinostratified bioclastic deposits belonging to the reef slope subenvironment showing no evidence of tectonic deformation (Bosellini and Russo, 1992;Pomar et al, 2014). Very low NRM intensities characterize these rocks (15-180 µA m −1 ), and stable ChRM components with maximum unblocking temperatures between 220 and 500 • C were isolated from 31 specimens ( Fig.…”

Section: Locality Castro (Oc)mentioning

confidence: 99%

Did Adria rotate relative to Africa?

et al. 2014

View full text Add to dashboard Cite

Abstract. The first and foremost boundary condition for kinematic reconstructions of the Mediterranean region is the relative motion between Africa and Eurasia, constrained through reconstructions of the Atlantic Ocean. The Adria continental block is in a downgoing plate position relative to the strongly curved central Mediterranean subductionrelated orogens, and forms the foreland of the Apennines, Alps, Dinarides, and Albanides-Hellenides. It is connected to the African plate through the Ionian Basin, likely with Lower Mesozoic oceanic lithosphere. If the relative motion of Adria versus Africa is known, its position relative to Eurasia can be constrained through a plate circuit, thus allowing robust boundary conditions for the reconstruction of the complex kinematic history of the Mediterranean region. Based on kinematic reconstructions for the Neogene motion of Adria versus Africa, as interpreted from the Alps and from Ionian Basin and its surrounding areas, it has been suggested that Adria underwent counterclockwise (ccw) vertical axis rotations ranging from ∼ 0 to 20 • . Here, we provide six new paleomagnetic poles from Adria, derived from the Lower Cretaceous to Upper Miocene carbonatic units of the Apulian peninsula (southern Italy). These, in combination with published poles from the Po Plain (Italy), the Istrian peninsula (Croatia), and the Gargano promontory (Italy), document a post-Eocene 9.8 ± 9.5 • counterclockwise vertical axis rotation of Adria. Our results do not show evidence of significant Africa-Adria rotation between the Early Cretaceous and Eocene. Models based on reconstructions of the Alps, invoking 17 • ccw rotation, and based on the Ionian Basin, invoking 2 • ccw rotation, are both permitted within the documented rotation range, yet are mutually exclusive. This apparent enigma could possibly be solved only if one or more of the following conditions are satisfied: (i) Neogene shortening in the western Alps has been significantly underestimated (by as much as 150 km); (ii) Neogene extension in the Ionian Basin has been significantly underestimated (by as much as 420 km); and/or (iii) a major sinistral strike-slip zone has decoupled northern and southern Adria in Neogene time. Here we present five alternative reconstructions of Adria at 20 Ma, highlighting the kinematic uncertainties, and satisfying the inferred rotation pattern from this study and/or from previously proposed kinematic reconstructions.

show abstract

“…Recently, Morsilli et al [2012] and Pomar et al [2014] demonstrated the existence of Late Eocene, coral-dominated build-ups, in relatively deep, mesophotic zone and relatively nutrient-rich water. These buildups are characterized by non-framework corals, with sparse coral colonies in a bioclastic, 20 muddy matrix.…”

Section: Discussionmentioning

confidence: 99%

“…Such conditions commonly correspond to a depth range of 40 to 80 m of water depth [Pomar, 2001] but they may also occur in dense seagrass meadows or in case of important turbidity [Pomar et al, 2014]. The absence of miliolids or green algae fragments do not support such 20 hypothesis for facies D2, that may be associated to the lower part of the mid-ramp.…”

mentioning

confidence: 91%

New insight of sedimentological and geochemical characterization of siliciclastic-carbonate deposits (Alveolina Limestone Formation, Graus-Tremp basin, Spain)

Hamon

Deschamps

Joseph

et al. 2016

Bulletin De La Société Géologique De France

View full text Add to dashboard Cite

This article is a first attempt of combining sedimentological analysis and geochemical systematics of the Alveolina Limestone Formation as a tool to identify the major stratigraphic surfaces, and to improve the sequence stratigraphy interpretation. This formation is Early Eocene in age and crops out in several well-exposed cliffs in the Serraduy – Roda de Isabena area (Graus-Tremp basin, NE Spain). Within this succession, nineteen carbonate and siliciclastic facies have been identified and grouped in environmental facies associations (based on their vertical stacking and lateral relationships): 1) coastal plain; 2) clastic deltaic complex; 3) shallow carbonate inner-ramp; 4) mid-ramp; 5) outer-ramp; 6) reefal facies. The depositional architectures studied in the Serraduy area can be directly assessed on the field, and a 3D reconstruction is proposed. This enables us to build a synthetic depositional model and to identify five small-scale T/R cycles, bounded by different kinds of sedimentary discontinuities : angular unconformity, firmground, erosional surface… In parallel, geochemical analyses (C and O isotopes, major, minor and trace elements) were carried out to help at hierarchizing the cycles and the boundaries previously identified. Four of them may be considered as major stratigraphic surfaces, corresponding either to regional-scale angular unconformities, or to exposure surfaces. The latter are characterized by a selective dissolution, a slight but sharp decrease in δ13CV-PDB and in Mg, Fe and Sr contents below the surface. The absence of typical sedimentary criteria of exposure (with the exception of these geochemical signatures) may be explained by short-term exposure, an arid to semi-arid climate, and a dominant low-magnesian calcite original mineralogy, precluding the development and the preservation of widespread vadose diagenetic products. A new sequence stratigraphy model for the Alveolina Limestone Fm is finally proposed and discussed.

show abstract

Carbonate ramp evolution during the Late Oligocene (Chattian), Salento Peninsula, southern Italy

Cited by 70 publications

References 78 publications

Depositional architecture and sequence stratigraphy of the Oligo–Miocene Asmari platform; Southeastern Izeh Zone, Zagros Basin, Iran

Depositional architecture and sequence stratigraphy of the Oligo–Miocene Asmari platform; Southeastern Izeh Zone, Zagros Basin, Iran

Did Adria rotate relative to Africa?

New insight of sedimentological and geochemical characterization of siliciclastic-carbonate deposits (Alveolina Limestone Formation, Graus-Tremp basin, Spain)

Contact Info

Product

Resources

About