Mio–Pliocene to Pleistocene paleotopographic evolution of Brittany (France) from a sequence stratigraphic analysis: relative influence of tectonics and climate

Brault, Nicolas; Bourquin, Sylvie; Guillocheau, François; Dabard, Marie‐Pierre; Bonnet, Stéphane; Courville, Philippe; Esteoule-Choux, J.; Stepanoff, F.

doi:10.1016/s0037-0738(03)00193-3

Cited by 37 publications

(41 citation statements)

References 44 publications

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“…Sedimentary coastlines with river deltas had retreated far to the west (Brault et al 2004), but deep trenches (e.g., Hurd Deep) may have remained marine. Genetic data discussed below for red and brown algae are consistent with a refugium in or near this area (Provan et al 2005, Hoarau et al 2007.…”

Section: Eastern North Atlantic/mediterranean Potential Refugiamentioning

confidence: 99%

Evaluating Signatures of Glacial Refugia for North Atlantic Benthic Marine Taxa

Maggs

Castilho

Foltz

et al. 2008

Ecology

510

598

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Abstract. A goal of phylogeography is to relate patterns of genetic differentiation to potential historical geographic isolating events. Quaternary glaciations, particularly the one culminating in the Last Glacial Maximum ;21 ka (thousands of years ago), greatly affected the distributions and population sizes of temperate marine species as their ranges retreated southward to escape ice sheets. Traditional genetic models of glacial refugia and routes of recolonization include these predictions: low genetic diversity in formerly glaciated areas, with a small number of alleles/haplotypes dominating disproportionately large areas, and high diversity including ''private'' alleles in glacial refugia. In the Northern Hemisphere, low diversity in the north and high diversity in the south are expected. This simple model does not account for the possibility of populations surviving in relatively small northern periglacial refugia. If these periglacial populations experienced extreme bottlenecks, they could have the low genetic diversity expected in recolonized areas with no refugia, but should have more endemic diversity (private alleles) than recently recolonized areas. This review examines evidence of putative glacial refugia for eight benthic marine taxa in the temperate North Atlantic. All data sets were reanalyzed to allow direct comparisons between geographic patterns of genetic diversity and distribution of particular clades and haplotypes including private alleles. We contend that for marine organisms the genetic signatures of northern periglacial and southern refugia can be distinguished from one another. There is evidence for several periglacial refugia in northern latitudes, giving credence to recent climatic reconstructions with less extensive glaciation.

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Section: Eastern North Atlantic/mediterranean Potential Refugiamentioning

confidence: 99%

Evaluating Signatures of Glacial Refugia for North Atlantic Benthic Marine Taxa

Maggs

Castilho

Foltz

et al. 2008

Ecology

510

598

View full text Add to dashboard Cite

show abstract

“…In most cases, it is difficult to interpret the spatial and temporal relationships of different groups of facies associations (Blakey et al, 1993;Tew and Manchini, 1995;Brault et al, 2004) and for most situations it is unfeasible to go further than the temporal resolution offered by biostratigraphic dating. This task is especially difficult in terrestrial and transitional areas, where quickly A C C E P T E D M A N U S C R I P T…”

Section: Introductionmentioning

confidence: 99%

Quantitative paleotopography and paleogeography around the Gibraltar Arc (South Spain) during the Messinian Salinity Crisis

et al. 2016

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“…The middle Miocene flood and associated marine bioclastic limestones (mainly located along the Carentan Flat, the Eastern Brittany Low and the Lower Loire Platform: Durand, 1959;Lécuyer et al, 1996;Courville and Bongrain, 2003;Dugué et al, 2005) are clearly of eustatic origin. The basement and these previous deposits were later incised by (1) a first drainage network during the late Miocene, forming valleys that became later filled by the continental to estuarine Upper Miocene to Pliocene "Red Sands" (Brault et al, 2004;Dugué et al, 2007); and (2) a second generation of rivers, which form the modern drainage and were emplaced around the early to middle Pleistocene boundary (Bonnet et al, 2000).…”

Section: Geomorphology and Landscape Evolution Since The Mesozoicmentioning

confidence: 99%

“…On the Armorican Massif, the Paleogene siliciclastic sediments are mostly claystones and siltstones, except for the silicified quartz-rich sandstones (so-called silcretes), which are of Ypresian to Bartonian age by analogy with those of the Paris Basin (Thiry et al, 1983;Thiry, 1999). The main change in the siliciclastic sedimentation record occurred during the late Miocene with the deposition of the "Red Sands" (Brault et al, 2004), which are coarse-grained estuarine sands filling a network of incised valleys distinct from the present-day one (Bonnet et al, 2000).…”

Section: Nature Of the Armorican Planation Surfacesmentioning

confidence: 99%

Planation surfaces of the Armorican Massif (western France):Denudation chronology of a Mesozoic land surface twice exhumed in response to relative crustal movements between Iberia and Eurasia

et al. 2015

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The Armorican Massif, an extensive outcrop of Variscan basement in western France, is shaped by several planation surfaces of debated origin and age. We propose an evolution model for these landforms and their deformation based on detailed mapping of the planation surfaces, their relative chronology and their relationships with dated outcrops of sediments and weathering products. The Armorican landscape consists of six stepped planation surfaces (labeled PS1 to PS6) later incised by two successive river networks. These landforms are pediments and pediplains or polygenic landforms (Armorican Planation Surface -PS5) resulting from two periods of etchplanation. These planation surfaces are mostly pre-late Cretaceous in age, based on the age of the sediments overlapping these pediments. The three older ones (PS1 to PS3) are pre-Pliensbachian (191-183 Ma); PS4 is preBajocian (170-168 Ma), PS5 (here called the "Armorican Planation Surface") is polygenic and ranges from the base of the early Cretaceous to the base of the Bartonian (140-40 Ma); and the youngest (PS6), which is poorly constrained, is older than 40 Ma (base of the Bartonian) or 15 Ma (base of the middle Miocene). Most of these "old" landforms are exhumed, i.e. they were buried by sediments and later re-exposed by denudation. At least two phases of burial and exhumation have been identified: (1) burial in Jurassic time followed by denudation during the early Cretaceous and (2) burial in late Cretaceous time followed by denudation during the latest Cretaceous to early Eocene. The depth of burial is unknown but is probably low due to the small amount of coeval siliciclastic sediments in the surrounding basins. The two periods of exhumation correspond to critical periods in the plate movements between Africa, Iberia and Eurasia. The first is probably related to the initiation and break-up of the rift between Iberia and Eurasia and the second to the convergence between these two plates.

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Mio–Pliocene to Pleistocene paleotopographic evolution of Brittany (France) from a sequence stratigraphic analysis: relative influence of tectonics and climate

Cited by 37 publications

References 44 publications

Evaluating Signatures of Glacial Refugia for North Atlantic Benthic Marine Taxa

Evaluating Signatures of Glacial Refugia for North Atlantic Benthic Marine Taxa

Quantitative paleotopography and paleogeography around the Gibraltar Arc (South Spain) during the Messinian Salinity Crisis

Planation surfaces of the Armorican Massif (western France):Denudation chronology of a Mesozoic land surface twice exhumed in response to relative crustal movements between Iberia and Eurasia

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