Integrated stratigraphy (magneto-, bio- and chronostratigraphy) and geochronology of the Palaeogene pelagic succession of the Umbria–Marche Basin (central Italy)

Coccioni, Rodolfo; Sideri, Marianna; Bancalà, Giuseppe; Catanzariti, Rita; Frontalini, Fabrizio; Jovane, Luigi; Montanari, A.; Savian, Jairo Francisco

doi:10.1144/sp373.4

Cited by 19 publications

(28 citation statements)

References 59 publications

(139 reference statements)

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“…The Monte Cagnero section (43°38′50″N, 12°28′05″E; Figures and ) is located approximately 100 km northwest of Massignano, and spans 225 m, covering the late Eocene ‐ Oligocene. This study focuses on the interval between 100 and 209 m (approximately 35.8–27.0 Ma; Coccioni et al, ; Jovane et al, ) and follows the revised stratigraphic framework of Coccioni et al (). The LO of hantkeninids places the EOB at 114.1 m (Hyland et al, ), while the last common occurrence (LCO) of Chiloguembelina cubensis at 189 m marks a proposed GSSP for the base of the Chattian (Coccioni et al, ).…”

Section: Geologic Setting and Published Geochronologymentioning

confidence: 99%

Reducing Disparity in Radio‐Isotopic and Astrochronology‐Based Time Scales of the Late Eocene and Oligocene

et al. 2017

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A significant discrepancy of up to 0.6 Myr exists between radio‐isotopically calibrated and astronomically tuned time scales of the late Eocene‐Oligocene. We explore the possible causes of this discrepancy through the acquisition of “high‐precision” 206Pb/238U dating of zircons from 11 volcanic ash beds from the Umbria‐Marche sedimentary succession, which hosts the Global Stratotype Section and Point for the base of the Oligocene. Our results indicate that the four 40Ar/39Ar dates from the Umbria‐Marche succession, which underpin the late Eocene‐Oligocene portion of the Paleogene geomagnetic polarity time scale in the 2012 edition of the Geological Time Scale, are anomalously old by up to 0.5 Myr. Conversely, when integrated with the established magnetic polarity record of the Umbria‐Marche succession, 206Pb/238U (zircon) data from this study result in Oligocene magnetic reversal ages that are generally equivalent to those obtained through the tuning of Ocean Drilling Program (ODP) Site 1218 (equatorial Pacific). Furthermore, our results indicate that the late Eocene tuning of ODP Site 1218, and International Ocean Discovery Program (IODP) Sites U1333–1334 (equatorial Pacific), to the 405 kyr eccentricity signal is accurate, at least back to 36 Ma. Propagating the full uncertainty of our radio‐isotopic data set and, where appropriate, taking into account locally derived astronomical time scales, we arrive at an age of 34.09 ± 0.08 Ma for the Eocene‐Oligocene boundary and 28.11 ± 0.17 Ma for the base of the Chattian.

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Section: Geologic Setting and Published Geochronologymentioning

confidence: 99%

Reducing Disparity in Radio‐Isotopic and Astrochronology‐Based Time Scales of the Late Eocene and Oligocene

et al. 2017

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“…; Coccioni et al . ; Coccioni & Premoli Silva ; and references therein). A detailed integrated stratigraphy of these deposits was summarized in several papers (Napoleone et al .…”

Section: Geological Settingmentioning

confidence: 99%

“…; Coccioni et al . ; Coccioni & Premoli Silva ; R. Coccioni, R. Catanzariti, F. Frontalini, B. Galbrun, L. Jovane, A. Montanari, J. Savian & M. Sideri, submitted and references therein).…”

Section: Geological Settingmentioning

confidence: 99%

“…The most complete successions of the Upper Cretaceous to Lower Miocene pelagic sediments of the Tethyan type crop out in the Bottaccione Gorge and the Contessa Valley located close to Gubbio. Owing to the continuous, pelagic deposition, a rather modest tectonic overprint, and the availability of excellent age control through magneto, bio, chemo and tephrostratigraphy, and direct radioisotopic dates from interbedded volcaniclastic layers, these sediments have played a prominent role in the establishment of the standard Cretaceous and Palaeogene time-scales (Lutherbacher & Premoli Silva 1964;Lowrie et al 1982;Coccioni et al 2013;Coccioni & Premoli Silva 2015;and references therein). A detailed integrated stratigraphy of these deposits was summarized in several papers (Napoleone et al 1983;Premoli Silva et al 1988a,b;Coccioni 1996;Montanari et al 1997;Coccioni et al 2013;Coccioni & Premoli Silva 2015;R.…”

Section: Geological Settingmentioning

confidence: 99%

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Evolutionary trend of Zoophycos morphotypes from the Upper Cretaceous–Lower Miocene in the type pelagic sections of Gubbio, Italy

Monaco

Bracchini²,

Rodrı́guez-Tovar

et al. 2017

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About 200 Zoophycos specimens, including 90 specimens studied in detail, have been analysed in the continuous Upper Cretaceous–Lower Miocene pelagic sedimentary type sections of the Gubbio area (the Contessa Highway, Contessa Quarry and Bottaccione sections, Northern Apennines). The sediments are reddish to grey limestones and marls of the Scaglia Group and marls with volcaniclastic deposits of the Bisciaro Formation. The aim was to examine the evolutionary trend of what is probably the most debated trace fossil of all time, from the Upper Cretaceous to Lower Miocene. Despite having been found in beds ranging from the Cambrian to the present, no consensus has been reached regarding mode of construction, tracemaker or ethological explanation for Zoophycos. Four Zoophycos morphotypes are recognized at Gubbio showing variations of major and minor lamellae, apex, lobes and whorls: the Cretaceous–Eocene cone‐shaped type 1, the Upper Eocene–Middle Oligocene helicoidal type 2, the Oligocene lobate type 3 and the Upper Oligocene–Lower Miocene flat type 4. The very high ichnodensity in some beds (hundreds of specimens in discrete levels of the Bisciaro Formation, now destroyed by quarrying) seems to find explanation in abnormal concentrations of phytodetritus and organic matter on the seafloor in some periods. This very high abundance in discrete levels reflects a change in sedimentation and seafloor conditions at pre‐flysch deposition. Due to such high ichnodensity, many adjacent specimens display deformed outer margins. Taphonomic analysis shows a variation of whorls, laminae and U‐shaped lobes, reflecting ontogenetic development of the tracemaker(s) (?sipunculid worms).

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“…We introduce applications that use magnetic direction and geomagnetic polarity reversals to infer geodynamo processes, tectonics, diagenesis and climate change. (Firth et al 2012;Savian et al 2013;Jovane et al 2013), and a composite integrated magnetostratigraphic sequence from Italy is provided for the entire Palaeogene Period (Coccioni et al 2012).…”

Section: Organization Of This Special Volumementioning

confidence: 99%

Magnetic methods and the timing of geological processes

Jovane

Hinnov²,

Housen

et al. 2013

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Magnetostratigraphy is best known as a technique that employs correlation among different stratigraphic sections using the magnetic directions that define geomagnetic polarity reversals as marker-horizons. The ages of the polarity reversals provide common tie points among the sections, allowing accurate time correlation. Recently, magnetostratigraphy has acquired a broader meaning, now referring to many types of magnetic measurements within a stratigraphic sequence. Many of these measurements provide correlation and age control not only for the older and younger boundaries of a polarity interval, but also within intervals. Thus, magnetostratigraphy no longer represents a dating tool based only on the geomagnetic polarity reversals, but comprises a set of techniques that includes measurements of all geomagnetic field parameters, environmental magnetism, rock magnetic and palaeoclimatic change recorded in sedimentary rocks, and key corrections to magnetic directions related to geodynamics, tectonics and diagenetic processes.

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Integrated stratigraphy (magneto-, bio- and chronostratigraphy) and geochronology of the Palaeogene pelagic succession of the Umbria–Marche Basin (central Italy)

Cited by 19 publications

References 59 publications

Reducing Disparity in Radio‐Isotopic and Astrochronology‐Based Time Scales of the Late Eocene and Oligocene

Reducing Disparity in Radio‐Isotopic and Astrochronology‐Based Time Scales of the Late Eocene and Oligocene

Evolutionary trend of Zoophycos morphotypes from the Upper Cretaceous–Lower Miocene in the type pelagic sections of Gubbio, Italy

Magnetic methods and the timing of geological processes

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