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Iaccarino, Silvia Maria
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- PublicationRestrictedHigh-resolution integrated stratigraphy of the upper Burdigalian-lower Langhian in the Mediterranean: the Langhian historical stratotype and new candidate sections for defining its GSSP(2011)
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;Iaccarino, S. M.; Dipartimento di Scienze della Terra, University of Parma, V.le G.P. Usberti 157/A - 43100 Parma (Italy) ;Di Stefano, A.; Dipartimento di Scienze Geologiche, University of Catania, Corso Italia 55 - 95129 Catania (Italy) ;Foresi, L. M.; Dipartimento di Scienze della Terra, University of Siena, Via Laterina 8 - 53100 Siena (Italy) ;Turco, E.; Dipartimento di Scienze della Terra, University of Parma, V.le G.P. Usberti 157/A - 43100 Parma (Italy) ;Baldassini, N.; Dipartimento di Scienze della Terra, University of Siena, Via Laterina 8 - 53100 Siena (Italy) ;Cascella, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Da Prato, S.; Dipartimento di Scienze della Terra, University of Siena, Via Laterina 8 - 53100 Siena (Italy) ;Ferraro, L.; Istituto per l’Ambiente Marino Costiero (IAMC) – CNR, Calata Porta di Massa 80 - 80133 Napoli (Italy) ;Gennari, R.; Dipartimento di Scienze della Terra, University of Parma, V.le G.P. Usberti 157/A - 43100 Parma (Italy) ;Hilgen, F. J.; Department of Earth Sciences, University of Utrecht, Budapestlaan 4 - 3584 CD Utrecht (The Netherlands) ;Lirer, F.; Istituto per l’Ambiente Marino Costiero (IAMC) – CNR, Calata Porta di Massa 80 - 80133 Napoli (Italy) ;Maniscalco, R.; Dipartimento di Scienze Geologiche, University of Catania, Corso Italia 55 - 95129 Catania (Italy) ;Mazzei, R.; Dipartimento di Scienze della Terra, University of Siena, Via Laterina 8 - 53100 Siena (Italy) ;Riforgiato, F.; Dipartimento di Scienze della Terra, University of Siena, Via Laterina 8 - 53100 Siena (Italy) ;Russo, B.; Dipartimento di Scienze della Terra, University of Naples, Largo S. Marcellino 10 – 80138 Napoli (Italy) ;Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Salvatorini, G.; Dipartimento di Scienze della Terra, University of Siena, Via Laterina 8 - 53100 Siena (Italy) ;Speranza, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Verducci, M.; Dipartimento di Scienze della Terra, University of Siena, Via Laterina 8 - 53100 Siena (Italy); ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; Results of high-resolution integrated stratigraphic studies (calcareous plankton and magnetostratigraphy) of three Mediterranean sections (La Vedova in Central Italy, Contrada Pesciarello in Sicily and St. Peter’s Pool in Malta) and one deep-sea core from the mid-latitude North Atlantic (DSDP Hole 608) are here synthesized. They are compared with those of previously studied deep marine sections in the Mediterranean including the historical stratotype, with the aim to select the most suitable section and criterion to define the Langhian GSSP (Global Stratotype Section and Point). This study significantly improves the existing magnetobiostratigraphic framework for the upper Burdigalian-lower Langhian and opens new perspectives for defining the Langhian GSSP. An extensive review of the first stages of the Globigerinoides-Praeorbulina evolutionary lineage pointed out that the Praeorbulina datum, historically used (and/or suggested) to approximate the base of the Langhian, coincides with the First Occurrence (FO) of P. glomerosa curva instead of P. sicana which is here included in the genus Globigerinoides. The FO of P. glomerosa curva occurs close to the C5Br/C5Bn.2n reversal boundary. As a consequence, the two recommended guiding criteria to recognize the base of the Langhian, i.e. the Praeorbulina datum and the top of Chron C5Cn.1n, can not be applied together, as these two events differ in age by ~740 kyr. The selection of either of these two criteria will imply a different duration for the Langhian: relatively short, in case the FO of P. glomerosa curva is selected, or longer and probably more acceptable, in case the top of Chron C5Cn.1n is selected. The primary calcareous plankton biohorizons which, according to our data, appoximate the top of Chron C5Cn.1n, are the Last Common Occurrence (LCO) of the calcareous nannofossil Helicosphaera ampliaperta and the LCO of the planktonic foraminifer Paragloborotalia bella. Other calcareous plankton events have been recorded close to the same magnetic reversal, such as a short influx of H. ampliaperta (Ia1) and the Paragloborotalia siakensis Acme0. The P. siakensis Acmea End (AaE) and the Sphenolithus heteromorphus Paracme End (PE) represent the primary plankton biohorizons associated with the P. glomerosa curva FO. Two of the three studied Mediterranean sections (La Vedova and St. Peter’s Pool), each from different point of view, are potentially suitable to be proposed as candidates for the definition of the Langhian GSSP. Yet, further studies on stable isotope stratigraphy and cyclostratigraphy, including astronomical tuning are necessary before the most suitable section and guiding criterion can be selected.341 61 - PublicationRestrictedIntegrated stratigraphy of the La Vedova section (Conero Riviera, Italy) and implications for the Burdigalian/Langhian boundary(2011)
; ; ; ; ; ; ;Turco, E.; Dipartimento di Scienze della Terra, Università di Parma, V.le G.P. Usberti 157/A, 43100 Parma, Italy ;Cascella, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Gennari, R.; Dipartimento di Scienze della Terra, Università di Torino, Via Valperga Caluso 35, 10123 Torino, Italy ;Hilgen, F. J.; Department of Earth Sciences, University of Utrecht, Budapestlaan 4, 3584 CD Utrecht, The Netherlands ;Iaccarino, S. M.; Dipartimento di Scienze della Terra, Università di Parma, V.le G.P. Usberti 157/A, 43100 Parma, Italy ;Sagnotti, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia; ; ; ; ; We present a high resolution integrated stratigraphy (calcareous plankton biostratigraphy and magnetostratigraphy) of the upper Burdigalian to lower Langhian interval in the La Vedova section (Conero Riviera, Italy). The succession of planktonic foraminifer and calcareous nannofossil events and their relative position in the La Vedova section are comparable with those recorded in other Mediterranean sections suggesting a continuous deposition across the Burdigalian/Langhian boundary interval. The high resolution magnetostratigraphic record, integrated with calcareous plankton events, has been correlated to the ATNTS2004 and ranges from sub-chrons C5Cn.1n to C5Bn.2n. In addition, the integrated magnetobiostratigraphic record of the La Vedova section provides a new magnetostratigraphic calibration of calcareous plankton events, thereby improving the existing Mediterranean biochronology for the upper Burdigalian to lower Langhian. On the basis of our magnetobiostratigraphic results, the deep marine La Vedova section could be considered a suitable succession for defining the Langhian GSSP (Global Stratotype Section and Point). The recommended guiding criteria to identify the base of the Langhian stage (the Praeorbulina datum and the magnetic reversal C5Cn/C5Br) are recorded in the section. In this work the Praeorbulina datum is represented by the first occurrence of P. glomerosa curva following Blow (1956; 1969). In the La Vedova section, this bioevent postdates the Acmea End of the planktonic foraminifer Paragloborotalia siakensis and the Paracme End of the calcareous nannofossil Sphenolithus heteromorphus, approximates the C5Br/C5Bn.2n reversal boundary and is dated at 15.23 Ma. The top of Chron C5Cn, dated at 15.974 Ma, is better approximated by the Last Common Occurrences of the calcareous nannofossil Helicosphaera ampliaperta and the planktonic foraminifer Paragloborotalia bella. At La Vedova the first occurrence of P. glomerosa curva is about 740 kyrs younger than C5Cn /C5Br reversal boundary, which represents the provisional guiding criterion to define the base of the Langhian (Lourens et al. 2004). The age difference between the Praeorbulina datum and the top of C5Cn implies that the Langhian GSSP cannot be located in a position close to both Chron C5Cn and the Praeorbulina datum (Lourens et al. 2004) and that the selection of either of these guiding criteria to identify the base of the Langhian will strongly affect its duration.290 35 - PublicationRestrictedHigh-resolution integrated calcareous plankton biostratigraphy and magnetostratigraphy at the Oligocene-Miocene transition in Southwestern Atlantic Ocean(2018-05)
; ; ; ; ; ; ; ; ; ; ; ; ;; ; After the formalization of the base of the Miocene in the Lemme‐Carrosio section (Italy) at the base of Subchron C6Cn.2n, the calcareous plankton biostratigraphy was refined in several open ocean Deep Sea Drilling Project/Ocean Drilling Program sites. However, high‐resolution quantitative biostratigraphic studies, integrating planktonic foraminifera and calcareous nannofossils, are still lacking for the time interval spanning the Oligocene–Miocene transition. Here, we present a reinvestigation of Deep Sea Drilling Project Hole 516F (Rio Grande Rise) and 4 oil wells drilled by Petróbras Brasileiro SA in the Campos Basin (SW Atlantic Ocean). We identified 12 planktonic foraminiferal and 18 calcareous nannofossil bioevents that have been integrated with an updated magnetostratigraphy of Hole 516F allowing the correlation with the GPTS and the identification of the Oligocene/Miocene boundary (base of Subchron C6Cn.2n) between the Top of Sphenolithus delphix and the Base of common Paragloborotalia kugleri. Furthermore, our results give new insights on the reliability of major calcareous plankton events across the Oligocene–Miocene transition: (a) the Sphenolithus ciperoensis Top, the S. delphix Base and Top, and the Sphenolithus cometa Base are reliable events at a global scale; (b) the Bases of Globoquadrina dehiscens and Sphenolithus disbelemnos > 4 μm are correlatable events only within the study sector of the SW Atlantic Ocean; and (c) the Globoturborotalita ciperoensis Top, Globoturborotalita angulisuturalis Top, and Sphenolithus procerus Base are diachronous. Finally, previously unreported biostratigraphic data, such as the distribution range of S. disbelemnos < 4 μm and Sphenolithus cf. S. pseudoheteromorphus, the Tenuitellinata praestainforthi acme interval, and the Top of common Globigerinoides primordius were identified in the Campos Basin.63 51 - PublicationRestrictedCalcareous plankton events at the Early/Middle Miocene transition of DSDP Hole 608: comparison with Mediterranean successions for definition of the Langhian GSSP(2011)
; ; ; ; ;Di Stefano, A.; Dipartimento di Scienze Geologiche, Universitá di Catania, C.so Italia 55, 95129 Catania, Italy ;Verducci, M.; Dipartimento di Scienze della Terra, Universitá di Siena, Via Laterina 8, 53100 Siena, Italy ;Cascella, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Iaccarino, S. M.; Dipartimento di Scienze della Terra, Universitá di Parma, Viale G.P. Usberti 157/a 43100 Parma, Italy; ; ; We propose a revision of the calcareous plankton biostratigraphy of the upper Burdigalian/early Langhian interval (Early/MiddleMiocene) of theDSDPHole 608 succession (northeastern Atlantic Ocean), one of themost complete open-ocean Miocene sequence. We detected a set of calcareous plankton events through a 26m thick succession (320-346 mbsf), spanning the interval from 14.969 to 17.268 Ma, chronologically constrained through paleomagnetic and astrochronological data. “Standard” bioevents were tested and in some cases they resulted poorly applicable to the investigated succession. Conversely, the quantitative biostratigraphic analysis highlighted additional biohorizons (Helicosphaera ampliaperta Last CommonOccurrence, Sphenolithus heteromorphus Paracme Interval, Paragloborotalia siakensisAcme “a”) considered till now restricted to theMediterranean region. This results in a better applicability of Mediterranean zonal schemes, providing a higher biostratigraphic resolution. Our results point out strict affinity between Atlantic and Mediterranean successions in Early/MiddleMiocene. Thus, in the perspective of establishing the Langhian GSSP, that according to the historical criterion must be located in the Mediterranean region, our results provide significant correlation tools between Mediterranean and open-ocean successions.280 23 - PublicationRestricted‘‘Earliest Zanclean age for the Colombacci and uppermost Di Tetto formations of the « latest Messinian » northern Apennines: New palaeoenvironmental data from the Maccarone section (Marche Province, Italy)’’ by Popescu et al. (2007) Geobios 40 (359–373)(2008)
; ; ; ; ; ; ; ; ; ; ; ; ;Roveri, M.; Dipartimento di Scienze della Terra, Università di Parma, Via G.P. Usberti, 157/A, 43100 Parma, Italy ;Bertini, A.; Dipartimento di Scienze della Terra, Università di Firenze, Via La Pira 4, 50121 Firenze, Italy ;Cipollari, P.; Dipartimento di Scienze Geologiche, Università Roma-Tre, L.go S. Leonardo Murialdo 1, 00146 Roma, Italy ;Cosentino, D.; Dipartimento di Scienze Geologiche, Università Roma-Tre, L.go S. Leonardo Murialdo 1, 00146 Roma, Italy ;Di Stefano, A.; Dipartimento di Scienze Geologiche, Università di Catania, Corso Italia 55, 95129 Catania, Italy ;Florindo, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma2, Roma, Italia ;Gennari, R.; Dipartimento di Scienze della Terra, Università di Parma, Via G.P. Usberti, 157/A, 43100 Parma, Italy ;Gliozzi, E.; Dipartimento di Scienze Geologiche, Università Roma-Tre, L.go S. Leonardo Murialdo 1, 00146 Roma, Italy ;Grossi, F.; Dipartimento di Scienze Geologiche, Università Roma-Tre, L.go S. Leonardo Murialdo 1, 00146 Roma, Italy ;Iaccarino, S.; Dipartimento di Scienze della Terra, Università di Parma, Via G.P. Usberti, 157/A, 43100 Parma, Italy ;Lugli, S.; Dipartimento di Scienze della Terra, Università di Modena e Reggio Emilia, Piazza S. Eufemia 19, 41100 Modena, Italy ;Manzi, V.; Dipartimento di Scienze della Terra, Università di Parma, Via G.P. Usberti, 157/A, 43100 Parma, Italy; ; ; ; ; ; ; ; ; ; ; Two possible alternative interpretations of the claimed Zanclean age (Popescu et al., 2007) of two historical lithostratigraphic units of the Northern Apennines, usually referred to as Late Messinian in age and recording the so called Lagomare final event of the Messinian salinity crisis (MSC), are here discussed. The wrong age attribution of the Colombacci and "tetto" Fms. is ruled out based on data from the Maccarone and other sections showing that the Colombacci-Argille Azzurre Fm. boundary is basin wide synchronous and coincident with the Miocene-Pliocene boundary as far as it has been formally defined in the Eraclea Minoa GSSP. Alternatively, the opportunity of emending the Zanclean GSSP to a stratigraphically lower horizon recording the first evidence of marine influences in the Mediterranean following the MSC peak, seems not suitable, as (1) the marine signature of uppermost Messinian deposits is weak and still controversial and (2) no significant bio- and magnetostratigraphic events, well chronologically defined and recognizable at a global scale appear to be available to such a purpose.258 23 - PublicationRestrictedAstronomical tuning of the La Vedova section between 16.3 and 15.0 Ma. Implications for the origin of megabeds and the Langhian GSSP(2017-01)
; ; ; ; ; ; ; ; ;; ; ; ; The early–middle Miocene, marked by the Middle Miocene Climatic Optimum (MMCO) followed by the Middle Miocene Climate Transition (MMCT) towards cooler temperatures, represents a crucial period in Earth’s climate evolution. To understand this episode and reconstruct its origin and the regional impact of the observed global changes, it is critical that high-resolution astronomical age models are developed for climate sensitive regions around the world. One of these areas undoubtedly is the Mediterranean, but so far no such an age model has been established for the interval of the MMCO. Nevertheless, this interval is well exposed in the coastal cliffs along the Adriatic Sea near Ancona (Italy), where it is characterized by the occurrence of 7 conspicuous limestone beds, termed megabeds, alternating with marl intervals. Here, we use the Lower La Vedova Beach section to construct an astronomical time scale for the younger part of the MMCO in the Mediterranean. The tuning to ~ 100-kyr eccentricity seems robust, but is less certain for precession in some intervals, as a consequence of the less clearly developed internal structure of the basic precession related cycles and uncertainties in the phase relation with climatic precession and insolation and in the astronomical solution in terms of tidal dissipation and dynamical ellipticity values. The tuning nevertheless provides astronomical ages for calcareous plankton events and magnetic reversals for the interval between 16.3 and 15.0 Ma. Individual megabeds are related to the ~ 100-kyr eccentricity cycle corresponding to eccentricity minima and the megabed interval itself is partly controlled by the 405-kyr cycle, as it marks two successive minima and the maximum in between. However, no relation with very long period eccentricity cycles (2.4 and 1 myr) is evident, and a link to regional tectonic processes (a major orogenic phase at the base of the Langhian and the likely associated Langhian transgression) seems more plausible. The higher sedimentation rate in the megabeds can be explained by the additional preservation of biogenic silica, which may also account for the diluted planktonic foraminiferal assemblages. With the integrated magnetobiostratigraphy and the tuning to eccentricity and to precession/insolation, the Lower La Vedova Beach section meets key requirements for defining the Langhian GSSP.355 12