Fig. 2. Lithology, water and total carbon content, cumulative grain-size distribution, and quartz, feldspar, and mica contents of core sequence Lz1013 from south-western Beaver Lake

• Main Authors: Wagner, Bernd, Hultzsch, Nadja, Melles, Martin, Gore, Damian B
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: AmeryOasis2001/2002; Beaver Lake; Amery Oasis; East Antarctica; Carbon; total; COMPCORE; Composite Core; DEPTH; sediment/rock; Kalifeldspar; Lz1013; Mica; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Quartz; Sampling/drilling in lake; Sand; Silt; Size fraction < 0.002 mm; clay; Size fraction > 2 mm; gravel; SPP1158; Water content; wet mass; Amery; Antarctic; Arctic; Antarc*; Antarctic Science; Antarctica; Sea ice
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.772616; https://doi.org/10.1594/PANGAEA.772616

A 100 cm long sediment sequence was recovered from Beaver Lake in Amery Oasis, East Antarctica, using gravity and piston corers. Sedimentological and mineralogical analyses and the absence of micro and macrofossils indicate that the sediments at the base of the sequence formed under glacial conditions, probably prior to c. 12 500 cal. yr BP. The sediments between c. 81 and 31 cm depth probably formed under subaerial conditions, indicating that isostatic uplift since deglaciation has been substantially less than eustatic sea-level rise and that large areas of the present-day floor of Beaver Lake must have been subaerially exposed following deglaciation. The upper 31 cm of the sediment sequence were deposited under glaciomarine conditions similar to those of today, supporting geomorphic observations that the Holocene was a period of relative sea-level highstand in Amery Oasis.