The Early Triassic ammonoid recovery: Paleoclimatic significance of diversity gradients

Brayard, Arnaud; Bucher, Hugo; Escarguel, Gilles; Fluteau, Frédéric; Bourquin, Sylvie; Galfetti, Thomas

doi:10.1016/j.palaeo.2006.02.003

Cited by 213 publications

(204 citation statements)

References 84 publications

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“…Overbank fines and floodplain sediments are almost ab sent. Similar deposits have been extensively described in ancient river systems (Cant and Walker, 1978;Miall, 1978;Crowley, 1983;Ramos et al, 1986;Bridge and Mackey, 1993;Bourquin et al, 2006;Gibling, 2006).…”

Section: General Sedimentary Interpretationsupporting

confidence: 69%

“…(Figs. 4, 16), but also clearly recognizable in other basins, such as the Paris Basin and western part of the Ger manic Basin (Aigner and Bachmann, 1992;Bourquin et al, 2006). Each of these MBS separates continental depositional cycles that show tendency of base-level rise and a possible interruption at their top, which was later reactivated by a new tectonic pulse.…”

Section: Benicassim Sectionmentioning

confidence: 91%

“…These paleogeographic barriers conditioned water supply in the basins of this area of the European plate that were controlled by hyper-arid to semi-arid climate in the northern and southern parts, respectively, of this mountain central belt during most of the Smithian (Ulicny, 2004;Bourquin et al, 2006Bourquin et al, , 2011.…”

Section: Paleogeography and Climate Conditionsmentioning

confidence: 99%

“…-- detail in the Vosges (NE France), central Germanic basin and Paris basin (Bourquin et al, 2006(Bourquin et al, , 2009Bourquin and Durand, 2007), and the Triassic Cheshire basin, UK (Mountney and Thompson, 2002). In fact, a major tectonic phase of the same age was related to an important structural reorganization in NW Europe (Geluk, 2005), which could be related to the final phase of collapse of the Variscan Belt (R6hling.…”

Section: Benicassim Sectionmentioning

confidence: 99%

“…Some important attempts have been made to tackle this problem in the Early Triassic series of continental origin from Central-Western Europe by means of different dating techniques when fossils were almost absent or poorly representative (e.g. Geluk and Rohling, 1997;Bourquin et al, 2006Bourquin et al, , 2009Filomena and Stollhofen, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Sedimentary evolution of the continental Early–Middle Triassic Cañizar Formation (Central Spain): Implications for life recovery after the Permian–Triassic crisis

López-Gómez

Galán-Abellán

Horra

et al. 2012

Sedimentary Geology

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The Permian-Triassic transition (P-T) was marked by important geochemical perturbations and the largest known life crisis. Consequences of this event, as oxygen-depleted conditions and the unusual behavior of the carbon cycle, were prolonged during the Early Triassic interval delaying the recovery of life in both ter restrial and marine ecosystems. Studies on Lower Triassic sediments of continental origin, as in the case of Western Europe, are especially problematic due to the scarcity of fossils and absence of precise dating. The The Cafiizar Fm. has been subdivided into six members (A-F) separated by seven (1-7) major bounding surfaces (MBS). These surfaces are well recognized laterally over hundred of km and they represent 10 4 _10 5 My. MBS-5 is considered to be of late Spathian age and it is a clear indication of tectonic activity, represented by a mild unconformity. This event represents a change in the sedimentary characteristics (reactivation) of the unit and from here to the top of the unit are found the first signals of biotic recovery, represented by tetrapod footprints, plants, roots and bioturbation. All of these characteristics and the esti mated age represented by the MBS-5 event permit this surface to be related to the coeval Hardegsen un conformity of Central-Western Europe. These first signals of biotic recovery can thus be related to an increased oxygen supply due to the new created paleogeographical corridors in the context of this tectonic activity. These biotic signals occurred 5 My after the Permian-Triassic limit crisis; a similar delay as oc curred in other coeval and neigh boring basins.

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