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Middle Pleistocene seismically induced clay diapirism in an intraplate zone, western Brittany, France ArchiMer
Van Vliet-lanoe, Brigitte; Authemayou, Christine; Molliex, Stephane; Field, Michael Hugh; Frechen, Manfred; Le Roy, Pascal; Perrot, Julie; Andrieu-ponel, Valerie; Gregoire, Gwendoline; Hallegouet, Bernard.
The Brittany region of France is located in a low seismicity intraplate zone. Most of the instrumented earthquakes are limited to a shallow crustal depth without surface rupture. A paleoseismological analysis was performed on deposits on the Crozon Peninsula and in the Elorn estuary. We highlight hydroplastic deformations induced by liquefaction leading to clay diapirism, which were likely triggered by past earthquakes. This diapirism seems to be frequent in continental nonconsolidated sediments and to develop on the inherited tectonic structures, when a shallow water table and confining layers exist. Timing of deformation is dated using paleoenvironmental data, and electron spin resonance and infrared-stimulated luminescence dating methods. Two seismic...
Tipo: Text Palavras-chave: Clay diapirism; Liquefaction; Earthquake; Saprolite; Brittany; Variscan structures; Paleoseismology; Intraplate; Middle Pleistocene.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00637/74955/76029.pdf
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Origin and parental genome characterization of the allotetraploid Stylosanthes scabra Vogel (Papilionoideae, Leguminosae), an important legume pasture crop. Repositório Alice
MARQUES, A.; MORAES, L.; SANTOS, M. A. dos; COSTA, I.; COSTA, L.; NUNES, T.; MELO, N. F. de; SIMON, M. F.; LEITCH, A. R.; ALMEIDA, C.; GUSTAVO SOUZA, G..
bitstream/item/190429/1/mcy113.pdf
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: GISH; RDNA; SNP; INDEL; Middle Pleistocene; Stylosanthes Scabra; Stylosanthes Viscosa; Stylosanthes hamata; Allopolyploidy; Chloroplast genome.
Ano: 2018 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1103930
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Terrestrial plant microfossils in palaeoenvironmental studies, pollen, microcharcoal and phytolith. Towards a comprehensive understanding of vegetation, fire and climate changes over the past one million years ArchiMer
Daniau, Anne-laure; Desprat, Stéphanie; Aleman, Julie C.; Bremond, Laurent; Davis, Basil; Fletcher, William; Marlon, Jennifer R.; Marquer, Laurent; Montade, Vincent; Morales-molino, César; Naughton, Filipa; Rius, Damien; Urrego, Dunia H..
The Earth has experienced large changes in global and regional climates over the past one million years. Understanding processes and feedbacks that control those past environmental changes is of great interest for better understanding the nature, direction and magnitude of current climate change, its effect on life, and on the physical, biological and chemical processes and ecosystem services important for human well-being. Microfossils from terrestrial plants – pollen, microcharcoal and phytoliths – preserved in terrestrial and marine sedimentary archives are particularly useful tools to document changes in vegetation, fire and land climate. They are well-preserved in a variety of depositional environments and provide quantitative reconstructions of past...
Tipo: Text Palavras-chave: Pollen; Microcharcoal; Phytolith; Terrestrial and marine sedimentary archives; Vegetation; Fire; Middle Pleistocene; Last glacial period; Holocene.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00485/59705/83610.pdf
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