Lake Boksehandsken's earliest postglacial sediments and their palaeoenvironmental implications, Jameson Land, East Greenland

Svante Björck, Ole Bennike, Olafur Ingolfsson, Lena Barnekow, David N. Penney

    Research output: Contribution to journalArticleResearchpeer-review

    58 Citations (Scopus)

    Abstract

    Lake Boksehandsken, the largest lake on Jameson Land, central East Greenland, is situated 54 m a.s.l. and holds a long (6.3 m) and complex stratigraphy. It was analysed with respect to lithology, carbon content, 14C, micro‐ and macrofossils. The diamict material in the bottom is overlain by a fining‐upwards sequence, possibly deposited close to a receding ice margin in a glaciomarine environment. These deposits are interpreted to have been formed at the time of the marine limit (c. 70 m) in the area. In spite of a large series of 14C datings, very few of the obtained dates were considered reliable. This is because the sediments contain coal fragments and old redeposited plant remains. Based on a set of arguments and correlations to the surrounding glacial stratigraphy it is implied that the marine limit and deglaciation cannot be much older than 10,000 BP. The lithology of the lake sediments, in combination with occurrence of marine macrofossils. shows that deglaciation was succeeded by a (glacio)marine depositional environment. The lake was isolated from the sea at c. 9000 BP. followed by a short transgression and a final isolation at c. 8400 BP. This sequence of events is demonstrated by both litho‐and biostratigraphy and possible causes are discussed. A later oscillation some time between 8000 and 7500 BP. evidenced by litho‐, carbon‐, pollen‐ and Pecliastrum stratigraphy, is interpreted as a regional climatic cooling possibly correlatable to a distinct δ18O minima in the Greenland ice cores.

    Original languageEnglish
    Pages (from-to)459-472
    Number of pages14
    JournalBoreas
    Volume23
    Issue number4
    DOIs
    Publication statusPublished - Dec 1994

    Programme Area

    • Programme Area 5: Nature and Climate

    Fingerprint

    Dive into the research topics of 'Lake Boksehandsken's earliest postglacial sediments and their palaeoenvironmental implications, Jameson Land, East Greenland'. Together they form a unique fingerprint.

    Cite this