Sedimentology on cores off Filchner Shelf Ice, Weddell Sea, Antarctica ...

• Main Authors: Wessels, Martin, Fütterer, Dieter K, Grobe, Hannes
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1989
• Subjects: Giant box corer; Gravity corer Kiel type; ANT-II/4; ANT-IV/3; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Antarc*; Antarctica; Antarktis*; Berkner Island; Filchner Ronne Ice Shelf; Filchner-Ronne Ice Shelf; Ice Sheet; Ice Shelf; Ronne Ice Shelf; Schelfeis*; Weddell Sea
• Online Access: https://dx.doi.org/10.1594/pangaea.701301; https://doi.pangaea.de/10.1594/PANGAEA.701301

The sediments of 14 box cores and 7 gravity cores, mainly taken directly in front of the Filchner(-Ronne) ice shelf northwest of Berkner Island (Weddell Sea), allowed to distinguish six sediment types. On the one hand,the retreat of the at first grounded and then floated ice from the last glacial maximum is documented. On the other hand,the sediments give an insight into extensive Holocene sediment deposition and remobilization northwest of Berkner Island.The ortho till was deposited directly by the grounded ice sheet and is lacking any marine influence. After floating of the ice shelf, partly very weIl stratified, partly unstratified, non-bioturbated paratill is deposited beneath the ice shelf. Lack of IRD-content in the paratill immediately above the orthotill indicates freezing at the bottom of the ice, at least for a short period after the ice became afloat. The orthotill and paratill contain small amounts of fragmented Tertiary diatoms, which allow the conclusion, that glacial-marine sediments in the ... : Supplement to: Wessels, Martin (1989): Sedimentationsprozesse an der Filchner Schelfeiskante, Antarktis. Diploma Thesis, Institut und Museum für Geologie und Paläontologie der Georg-August-Universität zu Göttingen (in Zusammenarbeit mit dem Alfred-Wegener-Institut), 126 pp ...