Sedimentology of various cores from the West Antarctic continental margin ...

• Main Authors: Hillenbrand, Claus-Dieter, Moreton, Steven Grahame, Caburlotto, Andrea, Pudsey, Carol J, Lucchi, Renata G, Smellie, John L, Benetti, Sara, Grobe, Hannes, Hunt, John B, Larter, Robert D
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2008
• Subjects: Drilling/drill rig; Piston corer; Gravity corer; Outcrop sample; ELT05; JR20040123; SEDANO-I; SEDANO-II; Ice_core_diverse; Eltanin; James Clark Ross; Explorer; Sampling/drilling ice; Antarc*; Antarctic; Antarctica; East Antarctica; EPICA; Marie Byrd Land; West Antarctica
• Online Access: https://dx.doi.org/10.1594/pangaea.671520; https://doi.pangaea.de/10.1594/PANGAEA.671520

Three megascopic and disseminated tephra layers (which we refer to as layers A, B, and C) occur in late Quaternary glaciomarine sediments deposited on the West Antarctic continental margin. The stratigraphical positions of the distal tephra layers in 28 of the 32 studied sediment cores suggest their deposition during latest Marine Isotopic Stage (MIS) 6 and MIS 5. One prominent tephra layer (layer B), which was deposited subsequent to the penultimate deglaciation (Termination II), is present in almost all of the cores. Geochemical analyses carried out on the glass shards of the layers reveal a uniform trachytic composition and indicate Marie Byrd Land (MBL), West Antarctica, as the common volcanic source. The geochemical composition of the marine tephra is compared to that of ash layers of similar age described from Mount Moulton and Mount Takahe in MBL and from ice cores drilled at Dome Fuji, Vostok and EPICA Dome C in East Antarctica. The three tephra layers in the marine sediments are chemically ... : Further relevant data sets: Barker et al. (1999) doi:10.1594/PANGAEA.671629, doi:10.1594/PANGAEA.671628, doi:10.1594/PANGAEA.671627, Braun (1997) doi:10.1594/PANGAEA.671632, doi:10.1594/PANGAEA.52388, Hillenbrand et al. (2003) doi:10.1594/PANGAEA.87294, Hillenbrand and Fütterer (2001) doi:10.1594/PANGAEA.58733, Hillenbrand (2000) doi:10.1594/PANGAEA.671631, doi:10.1594/PANGAEA.52723, Hillenbrand (1994) doi:10.1594/PANGAEA.50004, doi:10.1594/PANGAEA.50003, Lucchi et al. (2002) doi:10.1594/PANGAEA.671563, Moreton (1999) doi:10.1594/PANGAEA.671682, Pudsey (2000) doi:10.1594/PANGAEA.671626, Pudsey and Camerlenghi (1998) doi:10.1594/PANGAEA.671555, Wolf-Welling et al. (2002) doi:10.1594/PANGAEA.138621 ...