Paleo-environmental gateways in the eastern Canadian arctic – Recent isotope hydrology and diatom oxygen isotopes from Nettilling Lake, Baffin Island, Canada
نویسندگان
چکیده
منابع مشابه
Paleoecology of a '90,000-year lacustrine sequence from Fog Lake, Baffin Island, Arctic Canada
A 137 cm sediment core from Fog Lake, a small upland basin that was not glaciated during the Late Wisconsinan, reveals the following stratigraphic succession: (I) basal diamicton, (II) laminated silts, (III) compacted dewatered gyttja, (IV) stratified minerogenic sediments, and (V) overlying gyttja. Units I—III, and most of unit IV, were deposited prior to the Holocene; unit V represents approx...
متن کاملHolocene glaciation and climate evolution of Baffin Island, Arctic Canada
Lake sediment cores and cosmogenic exposure (CE) dates constrain the pattern of deglaciation and evolution of climate across Baffin Island since the last glacial maximum (LGM). CE dating of erratics demonstrates that the northeastern coastal lowlands became ice-free ca.14 ka as the Laurentide Ice Sheet (LIS) receded from its LGM margin on the continental shelf. Coastal lakes in southeastern Baf...
متن کاملRadiocarbon Geochemistry of Modern and Ancient Arctic Lake Systems, Baffin Island, Canada
prior to being transported into the lake system. The combinaThe accuracy of Arctic lake chronologies has been assessed by tion of these factors commonly leads to radiocarbon ages measuring the C activities of modern carbon sources and that are apparently too old. Discrete macrofossils are rarely applying these isotopic mass balances to dating fossil lake materifound in sufficient quantities for...
متن کاملClimate of the past millennium inferred from varved proglacial lake sediments on northeast Baffin Island, Arctic Canada
This study uses Pu-dated varved sediments from Big Round Lake, a proglacial lake on northeast Baffin Island, Arctic Canada to generate a 1000-year-long, annual-resolution record of past climate. Varve thickness is positively correlated with July–August–September temperature measured at Clyde River, 70 km to the north of the lake (r = 0.46, p \ 0.001). We therefore interpret the variability and ...
متن کاملA 2000-yr-long multi-proxy lacustrine record from eastern Baffin Island, Arctic Canada reveals first millennium AD cold period
a Department of Geological Sciences, Brown University, Providence, RI, USA b Department of Geological Sciences, University at Buffalo, Buffalo, NY, USA c Department of Earth and Planetary Sciences, Northwestern University, Evanston, IL, USA d Department of Geosciences, University of Massachusetts, 233 Morrill Science Center, Amherst, MA 01003, USA e INSTAAR and Department of Geological Sciences...
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ژورنال
عنوان ژورنال: Quaternary Science Reviews
سال: 2016
ISSN: 0277-3791
DOI: 10.1016/j.quascirev.2016.03.028