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	Provedor de dados ArchiMer (2) Autor Jansen, Eystein (2) Rutledal, Sunniva (2) Berben, Sarah M.p. (1) Berben, Sarah Mp (1) Cederstrøm, Jan Magne (1) Dokken, Trond M. (1) Griem, Lisa (1) Haflidason, Hafkidi (1) Van Der Bilt, Willem G.m. (1) Mais... Palavra-chave Tephra isochrons (2) Tephrochronology (2) Cryptotephra Tephrostratigraphy (1) FMAZ II (1) Geochemistry (1) Marine sediment cores Quaternary (1) Marine tephra (1) NAAZ II (1) North Atlantic (1) North Atlantic Ocean (1) Paleoceanography (1) Quaternary (1) Mais... Tipo do documento Text (2) Ano 2020 (2) País France (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka ArchiMer Rutledal, Sunniva; Haflidason, Hafkidi; Berben, Sarah Mp; Griem, Lisa; Jansen, Eystein. Volcanic ash preserved in marine sediment sequences is key for independent synchronization of palaeoclimate records within and across different climate archives. Here we present a continuous tephrostratigraphic record from the Labrador Sea, spanning the last 65.5 ka, an area and time period that has not been investigated in detail within the established North Atlantic tephra framework. We investigated marine sediment core GS16]204] 22CC for increased tephra occurrences and geochemically analysed the major element composition of tephra shards to identify their source volcano(es). In total we observed eight tephra zones, of which five concentration peaks show isochronous features that can be used as independent tie]points in future studies. The main... Tipo: Text Palavras-chave: Marine tephra; North Atlantic; Quaternary; Tephra isochrons; Tephrochronology. Ano: 2020 URL: https://archimer.ifremer.fr/doc/00648/76044/76980.pdf Tephra horizons identified in the western North Atlantic and Nordic Seas during the Last Glacial Period: Extending the marine tephra framework ArchiMer Rutledal, Sunniva; Berben, Sarah M.p.; Dokken, Trond M.; Van Der Bilt, Willem G.m.; Cederstrøm, Jan Magne; Jansen, Eystein. Geochemically distinct volcanic ash (tephra) deposits are increasingly acknowledged as a key geochronological tool to synchronize independent paleoclimate archives. Recent advances in the detection of invisible (crypto) tephra have led to the ongoing establishment, development and integration of regional tephra lattices. These frameworks offer an overview of the spatial extent of geochemically characterized tephra from dated eruptions – a valuable tool for precise correlation of paleorecords within these areas. Here, we harness cryptotephra analysis to investigate the occurrence of two well-known tephra markers from the Last Glacial Period (i.e. FMAZ II-1 (26.7 ka b2k) and NAAZ II (II-RHY-1) (55.3 ka b2k)), in marine sediment cores from the Nordic,... Tipo: Text Palavras-chave: Tephrochronology; Cryptotephra Tephrostratigraphy; Tephra isochrons; FMAZ II; NAAZ II; Geochemistry; Paleoceanography; Marine sediment cores Quaternary; North Atlantic Ocean. Ano: 2020 URL: https://archimer.ifremer.fr/doc/00614/72659/71665.pdf Registros recuperados: 2 Primeira ... 1 ... Última

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