A complete terrestrial Oligocene magnetobiostratigraphy from the Ebro Basin, Spain

Barberà, Xavier Mas; Cabrera, Lluı́s; Marzo, M.; Parés, Josep M.; Agustí, Jorge

doi:10.1016/s0012-821x(01)00270-9

Cited by 60 publications

(47 citation statements)

References 33 publications

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“…A total of 191 palaeomagnetic sites were sampled at a mean resolution of about 2.6 m, which is sufficient to allow a complete identification of the Upper Eocene-Lower Oligocene geomagnetic polarity reversals considering mean accumulation rates of about 10-15 cm/kyr reported in neighbouring areas of the Ebro Basin (Vergés et al, 1998;Barberà et al, 2001). Fine-grained sediments are abundant through the section, and sampling was focused on both red mudstones and white micritic limestones.…”

Section: Sampling and Methodsmentioning

confidence: 99%

“…The retraction of the central-basin lake systems and the basinwards expansion and incision of the fringing fluvial fans is interpreted as a response to the aridification process that accompanied the Late Eocene-Oligocene global cooling. Evidences of this palaeoenvironmental aridification are found in the Late Eocene Ebro Basin palaeofloral record (Cavagnetto and Anadón, 1996;Barberà et al, 2001) as well as in vast regions of Eurasia (Collinson and Hooker, 2003;Dupont-Nivet et al, 2007;Akhmetiev and Beniamovski, 2009).…”

Section: The Sedimentary Record Of the Eocene-oligocene Transition Inmentioning

confidence: 99%

“…Late Eocene (Sant Cugat de Gavadons) to Early Oligocene (Santpedor) vertebrate fossil assemblages have been reported in the basal sediments of the Artés Formation Anadón et al, 1987Anadón et al, , 1992Sáez, 1987;Arbiol and Sáez, 1988). Younger units south westwards have provided a complete Oligocene magnetostratigraphic record which contributed to the age calibration of the Western Europe MP mammal biochronology (Barberà, 1999;Barberà et al, 2001). …”

Section: The Ebro Basinmentioning

confidence: 99%

“…Hooker et al (2009) also proposed the correlation of the BNPZ to C13r.1n, a short subchron not present in the GPTS 2004 (Gradstein et al, 2004), but recorded at Site 1090 of the South Atlantic Ocean (Channell et al, 2003). The existence of subchron C13r.1n, however, is controversial since it has not been recorded in other high- (Gradstein et al;, 2004) with indication of the vertebrate localities and their corresponding MP reference levels Anadón et al, 1987Anadón et al, , 1992Sáez, 1987;Arbiol and Sáez, 1988;Barberà et al, 2001 Barberà et al (2001). The Jorba-La Panadella lithostratigraphic section (C) (Feist et al, 1994) correlates the Maians-Rubió composite section (B) of Costa et al (2010) with the Rocafort-Vinaixa section of Barberà et al (2001) The regional significant Santpedor sandstone unit has been used to correlate the Moià-Santpedor composite section with the magnetostratigraphic composite sections of Maians-Rubió (Costa et al, 2010) and Rocafort-Vinaixa .…”

Section: Correlation Between the Ebro And The Hampshire Basinsmentioning

confidence: 99%

“…The existence of subchron C13r.1n, however, is controversial since it has not been recorded in other high- (Gradstein et al;, 2004) with indication of the vertebrate localities and their corresponding MP reference levels Anadón et al, 1987Anadón et al, , 1992Sáez, 1987;Arbiol and Sáez, 1988;Barberà et al, 2001 Barberà et al (2001). The Jorba-La Panadella lithostratigraphic section (C) (Feist et al, 1994) correlates the Maians-Rubió composite section (B) of Costa et al (2010) with the Rocafort-Vinaixa section of Barberà et al (2001) The regional significant Santpedor sandstone unit has been used to correlate the Moià-Santpedor composite section with the magnetostratigraphic composite sections of Maians-Rubió (Costa et al, 2010) and Rocafort-Vinaixa . (E) accumulation curves and the mean sedimentation rates derived from the proposed correlation of the Moià-Santpedor local magnetostratigraphy are also compared to the values for the Maians-Rubió (Costa et al, 2010) and Rocafort-Vinaixa ).…”

Section: Correlation Between the Ebro And The Hampshire Basinsmentioning

confidence: 99%

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The age of the “Grande Coupure” mammal turnover: New constraints from the Eocene–Oligocene record of the Eastern Ebro Basin (NE Spain)

Costa

Garcés

Sáez

et al. 2011

Palaeogeography, Palaeoclimatology, Palaeoecology

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a b s t r a c t a r t i c l e i n f oThe Grande Coupure represents a major terrestrial faunal turnover recorded in Eurasia associated with the overall climate shift at the Eocene-Oligocene transition. During this event, a large number of European Eocene endemic mammals became extinct and new Asian immigrants appeared. The absolute age of the Grande Coupure, however, has remained controversial for decades. The Late Eocene-Oligocene continental record of the Eastern Ebro Basin (NE Spain) constitutes a unique opportunity to build a robust magnetostratigraphybased chronostratigraphy which can contribute with independent age constraints for this important turnover. This study presents new magnetostratigraphic data of a 495-m-thick section (Moià-Santpedor) that ranges from 36.1 Ma to 33.3 Ma. The integration of the new results with previous litho-bio-and magnetostratigraphic records of the Ebro Basin yields accurate ages for the immediately pre-and postGrand Coupure mammal fossil assemblages found in the study area, bracketing the Grande Coupure to an age embracing the Eocene-Oligocene transition, with a maximum allowable lag of 0.5 Myr with respect to this boundary. The shift to drier conditions that accompanied the global cooling at the Eocene-Oligocene transition probably determined the sedimentary trends in the Eastern Ebro Basin. The occurrence and expansion of an amalgamated-channel sandstone unit is interpreted as the forced response of the fluvial fan system to the transient retraction of the central-basin lake systems. The new results from the Ebro Basin allow us to revisit correlations for the controversial Eocene-Oligocene record of the Hampshire Basin (Isle of Wight, UK), and their implications for the calibration of the Mammal Palaeogene reference levels MP18 to MP21.

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Section: Sampling and Methodsmentioning

confidence: 99%

Section: The Sedimentary Record Of the Eocene-oligocene Transition Inmentioning

confidence: 99%

Section: The Ebro Basinmentioning

confidence: 99%

Section: Correlation Between the Ebro And The Hampshire Basinsmentioning

confidence: 99%

Section: Correlation Between the Ebro And The Hampshire Basinsmentioning

confidence: 99%

See 3 more Smart Citations

The age of the “Grande Coupure” mammal turnover: New constraints from the Eocene–Oligocene record of the Eastern Ebro Basin (NE Spain)

Costa

Garcés

Sáez

et al. 2011

Palaeogeography, Palaeoclimatology, Palaeoecology

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Late Miocene-Pleistocene evolution of India-Eurasia convergence partitioning between the Bhutan Himalaya and the Shillong Plateau: New evidences from foreland basin deposits along the Dungsam Chu section, eastern Bhutan

et al. 2016

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The Shillong Plateau is a unique basement‐cored uplift in the foreland of the eastern Himalaya that accommodates part of the India‐Eurasia convergence since the late Miocene. It was uplifted in the late Pliocene to 1600 m, potentially inducing regional climatic perturbations by orographically condensing part of the Indian Summer Monsoon (ISM) precipitations along its southern flank. As such, the eastern Himalaya‐Shillong Plateau‐ISM is suited to investigate effects of tectonics, climate, and erosion in a mountain range‐broken foreland system. This study focuses on a 2200 m thick sedimentary section of the Siwalik Group strategically located in the lee of the Shillong Plateau along the Dungsam Chu at the front of the eastern Bhutan Himalaya. We have performed magnetostratigraphy constrained by vitrinite reflectance and detrital apatite fission track dating, combined with sedimentological and palynological analyses. We show that (1) the section was deposited between ~7 and 1 Ma in a marginal marine deltaic transitioning into continental environment after 5 Ma, (2) depositional environments and paleoclimate were humid with no major change during the depositional period indicating that the orographic effect of the Shillong Plateau had an unexpected limited impact on the paleoclimate of the Bhutanese foothills, and (3) the diminution of the flexural subsidence in the basin and/or of the detrital input from the range is attributable to a slowdown of the displacement rates along the Main Boundary Thrust in eastern Bhutan during the latest Miocene‐Pleistocene, in response to increasing partitioning of the India‐Eurasia convergence into the active faults bounding the Shillong Plateau.

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Kinematics of Active Deformation Across the Western Kunlun Mountain Range (Xinjiang, China) and Potential Seismic Hazards Within the Southern Tarim Basin

et al. 2017

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The Western Kunlun mountain range is a slowly converging intracontinental orogen where deformation rates are too low to be properly quantified from geodetic techniques. This region has recorded little seismicity, but the recent July 2015 (Mw 6.4) Pishan earthquake shows that this mountain range remains seismic. To quantify the rate of active deformation and the potential for major earthquakes in this region, we combine a structural and quantitative morphological analysis of the Yecheng–Pishan fold, along the topographic mountain front in the epicentral area. Using a seismic profile, we derive a structural cross section in which we identify the fault that broke during the Pishan earthquake, an 8–12 km deep blind ramp beneath the Yecheng–Pishan fold. Combining satellite images and DEMs, we achieve a detailed morphological analysis of the Yecheng–Pishan fold, where we find nine levels of incised fluvial terraces and alluvial fans. From their incision pattern and using age constraints retrieved on some of these terraces from field sampling, we quantify the slip rate on the underlying blind ramp to 0.5 to 2.5 mm/yr, with a most probable long‐term value of 2 to 2.5 mm/yr. The evolution of the Yecheng–Pishan fold is proposed by combining all structural, morphological, and chronological observations. Finally, we compare the seismotectonic context of the Western Kunlun to what has been proposed for the Himalayas of Central Nepal. This allows for discussing the possibility of M ≥ 8 earthquakes if the whole decollement across the southern Tarim Basin is seismically locked and ruptures in one single event.

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A complete terrestrial Oligocene magnetobiostratigraphy from the Ebro Basin, Spain

Cited by 60 publications

References 33 publications

The age of the “Grande Coupure” mammal turnover: New constraints from the Eocene–Oligocene record of the Eastern Ebro Basin (NE Spain)

The age of the “Grande Coupure” mammal turnover: New constraints from the Eocene–Oligocene record of the Eastern Ebro Basin (NE Spain)

Late Miocene-Pleistocene evolution of India-Eurasia convergence partitioning between the Bhutan Himalaya and the Shillong Plateau: New evidences from foreland basin deposits along the Dungsam Chu section, eastern Bhutan

Kinematics of Active Deformation Across the Western Kunlun Mountain Range (Xinjiang, China) and Potential Seismic Hazards Within the Southern Tarim Basin

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