The Global Stratotype Section and Point (GSSP) for the base of the Neogene

Steininger, Fritz F.; Aubry, Marie‐Pierre; Berggren, William A.; Biolzi, Milena; Borsetti, Anna Maria; Cartlidge, Julie E.; Cati, F.; Corfield, Richard; Gelati, R.; Iaccarino, S.; Napoleone, C.; Ottner, Franz; Rögl, Fred; Roetzel, Reinhard; Spezzaferri, Silvia; Tateo, Fabio; Villa, Giuliana; Zevenboom, D.

doi:10.18814/epiiugs/1997/v20i1/005

Cited by 96 publications

(43 citation statements)

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“…Only the last one has a reliable biostratigraphic value. Literature data regarding the distribution range of S. delphix show discrepancies: In the Lemme‐Carrosio GSSP, the corresponding stratigraphic interval shown in Steininger et al () was reported from 47 m (within Chron C6Cr) to 31 m (within Subchron C6n.1r), although Aubry and Villa () in the same section reported only rare and discontinuous presence from just below the boundary up to Subchron C6n.1r. However, the preservation and the rare occurrence of sphenoliths in the Neogene base stratotype section shed doubts on the real distribution of S. delphix .…”

Section: Resultsmentioning

confidence: 88%

“…Paragloborotalia kugleri , which evolves from Paragloborotalia pseudokugleri (following Blow, ), has a great stratigraphic importance at the OMT. In fact, the Base of P. kugleri defines the lower boundary of Zone M1 (Berggren et al, ; Wade et al, ) and is used to approximate the O/Mb (Berggren et al, 1983, , 1995; Steininger et al, ). In the Lemme‐Carrosio section, the P. kugleri Base falls 2 m above the base of the Neogene, defined at the older end of Subchron C6Cn.2n (Steininger et al, ).…”

Section: Resultsmentioning

confidence: 99%

“…The Base and Top of S. delphix , the Base of regular Globigerinoides gr., the Top of S. capricornutus , and the Base of common P. kugleri , all occurring in a relatively short stratigraphic interval, allowed the correlation between the Campos Basin wells (A and C) and Hole 516F across the O/Mb. Following the formal definition of the boundary in the GSSP (Steininger et al, ), in Hole 516F, the O/Mb is placed at the base of Subchron C6Cn.2n, which is approximated by the Top of S. delphix (below) and by the Top of S. capricornutus and Base of common P. kugleri (above). The magnetostratigraphic position of the Base of common of P. kugleri and its relative position above the S. delphix Top and close to the of S. capricornutus Top, indicate that the Base of common P. kugleri can be considered time‐equivalent to the Base of P. kugleri recorded in the Lemme‐Carrosio section (Steininger et al, ) and at low latitude (Leg 154, Pearson & Chaisson, ); therefore, in this study, this bioevent is used to define the base of Zone M1 (Wade et al, ).…”

Section: High‐resolution Integrated Calcareous Plankton Biostratigrapmentioning

confidence: 99%

“…Following the formal definition of the boundary in the GSSP (Steininger et al, ), in Hole 516F, the O/Mb is placed at the base of Subchron C6Cn.2n, which is approximated by the Top of S. delphix (below) and by the Top of S. capricornutus and Base of common P. kugleri (above). The magnetostratigraphic position of the Base of common of P. kugleri and its relative position above the S. delphix Top and close to the of S. capricornutus Top, indicate that the Base of common P. kugleri can be considered time‐equivalent to the Base of P. kugleri recorded in the Lemme‐Carrosio section (Steininger et al, ) and at low latitude (Leg 154, Pearson & Chaisson, ); therefore, in this study, this bioevent is used to define the base of Zone M1 (Wade et al, ). We note that the S. capricornutus Top occurs either slightly below or above the Base of common P. kugleri in Hole 516F and Well A, respectively; conversely, in Well C, this event occurs within the range of S. delphix .…”

Section: High‐resolution Integrated Calcareous Plankton Biostratigrapmentioning

confidence: 99%

“…The Global Stratotype Section and Point (GSSP) of the base of the Neogene was formally defined in the Lemme‐Carrosio section, in Northern Italy, at the base of Subchron C6Cn.2n, at meter 35, and approximated by means of the calcareous nannofossil Sphenolithus delphix and Sphenolithus capricornutus ranges (35 to 32 m and 40 to 35 m, respectively) and by the planktonic foraminifer Paragloborotalia kugleri base, which occurs 2 m above the boundary (Steininger, Aubry, Berggren, Beard, & Jeffords, ).…”

Section: Introductionmentioning

confidence: 99%

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High‐resolution integrated calcareous plankton biostratigraphy and magnetostratigraphy at the Oligocene–Miocene transition in Southwestern Atlantic Ocean

Gennari¹,

Persico²,

Turco³

et al. 2017

Geological Journal

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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.

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Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: High‐resolution Integrated Calcareous Plankton Biostratigrapmentioning

confidence: 99%

Section: High‐resolution Integrated Calcareous Plankton Biostratigrapmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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High‐resolution integrated calcareous plankton biostratigraphy and magnetostratigraphy at the Oligocene–Miocene transition in Southwestern Atlantic Ocean

Gennari¹,

Persico²,

Turco³

et al. 2017

Geological Journal

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New magnetobiostratigraphic chronology and paleoceanographic changes across the Oligocene‐Miocene boundary at DSDP Site 516 (Rio Grande Rise, SW Atlantic)

et al. 2015

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New magnetobiostratigraphic data for the late Oligocene through early Miocene at Deep Sea Drilling Project (DSDP) Hole 516F provide a significantly revised age model, which permits reevaluation of developments that led to the Mi-1 glacial event at the Oligocene-Miocene boundary. Our new high-resolution paleomagnetic study, which is supported by quantitative calcareous nannofossil and planktonic foraminiferal analyses, significantly refines previous age models for Oligocene-Miocene sediments from DSDP Hole 516F, with ages that are systematically younger than those previously determined. In some parts of the Oligocene, the discrepancy with previous studies exceeds 450 kyr. Based on this new age model, we infer a progressive increase in sedimentation rate and paleoproductivity between circa 23.9 Ma and circa 22.9 Ma, with the highest rate coinciding with the Mi-1 glacial event at the Oligocene-Miocene boundary. This productivity increase would have resulted in higher rates of carbon burial and in turn a drawdown of atmospheric CO 2 . Immediately afterward, an abrupt decrease in sedimentation rate and paleoproductivity suggests that the Mi-1 deglaciation was associated with decreased carbon input into the ocean. Elevated sedimentation rates are also documented at~24.5 Ma, coincident with the Oi2D glacioeustatic event. The presence of volcanic material within the sediments during these glacial events is interpreted to have resulted from redeposition of sediment scoured from nearby sites on the Rio Grande Rise due to transient variations in bottom water flow patterns.

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