Chronostratigraphy of the 600,000 year old continental record of Lake Van ...

• Main Authors: Stockhecke, Mona, Kwiecien, Ola, Vigliotti, Luigi, Anselmetti, Flavio, Beer, Jürg, Cagatay, Namik, Channel, James E T, Kipfer, Rolf, Lachner, Johannes, Litt, Thomas, Pickarski, Nadine, Sturm, Michael
• Format: Text
• Language: English
• Published: Pergamon 2014
• Subjects: 550 Earth sciences & geology; Greenland; Greenland ice core; ice core; NGRIP
• Online Access: https://dx.doi.org/10.7892/boris.50755; https://boris.unibe.ch/50755/

Lake Van sediment cores from the Ahlat Ridge and Northern Basin drill sites of the ICDP project PALEOVAN contain a wealth of information about past environmental processes. The sedimentary sequence was dated using climatostratigraphic alignment, varve chronology, tephrostratigraphy, argon-argon single-crystal dating, radiocarbon dating, magnetostratigraphy, and cosmogenic nuclides. Based on the lithostratigraphic framework, the different age constraints are compiled and a robust and precise chronology of the 600,000 year-old Lake Van record is constructed. Proxy records of total organic carbon content and sediment color, together with the calcium/potassium-ratios and arboreal pollen percentages of the 174-meter-long Ahlat Ridge record, mimic the Greenland isotope stratotype (NGRIP). Therefore, the proxy records are systematically aligned to the onsets of interstadials reflected in the NGRIP or synthesized Greenland ice-core stratigraphy. The chronology is constructed using 27 age control points derived from ...