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An Early Pleistocene interglacial deposit at Pingorsuit, North-West Greenland

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

DOI

  • Ole Bennike, De Nationale Geologiske Undersøgelser for Danmark og Grønland
    • ,
  • William Colgan, De Nationale Geologiske Undersøgelser for Danmark og Grønland
    • ,
  • Lars Hedenäs, Swedish Museum of Natural History
    • ,
  • Oliver Heiri, University of Basel
    • ,
  • Geoffrey Lemdahl, Linnaeus University
    • ,
  • Peter Wiberg-Larsen
  • Sofia Ribeiro, De Nationale Geologiske Undersøgelser for Danmark og Grønland
    • ,
  • Roberto Pronzato, University of Genoa
    • ,
  • Renata Manconi, University of Sassari
    • ,
  • Anders A. Bjørk, Københavns Universitet

At the Pingorsuit Glacier in North-West Greenland, an organic-rich deposit that had recently emerged from the retreating ice cap was discovered at an elevation of 480 m above sea level. This paper reports on macrofossil analyses of a coarse detritus gyttja and peaty soil, which occurred beneath a thin cover of till and glacifluvial deposits. The sediments contained remains of vascular plants, mosses, beetles, caddisflies, midges, bryozoans, sponges and other invertebrates. The flora includes black spruce, tree birch, boreal shrubs and wetland and aquatic taxa, which shows that mires, lakes and ponds were present in the area. We describe a new extinct waterwort species Elatine odgaardii. The fossils were deposited in a boreal environment with a mean July air temperature that was at least 9 °C higher than at present. The fossil assemblages show strong similarities with others from Greenland that have been assigned an Early Pleistocene age, and we suggest a similar age for the sediments found at the margin of the Pingorsuit Glacier. At the Pingorsuit Glacier in North-West Greenland, an organic-rich deposit was discovered at an elevation of 480 m above sea level. The sediments contained remains of vascular plants, mosses, beetles, caddisflies, midges, bryozoans, sponges and other invertebrates. The fossils were deposited in a boreal environment with a mean July air temperature that was at least 9 °C higher than at present.

OriginalsprogEngelsk
TidsskriftBoreas
Vol/bind52
Nummer1
Sider (fra-til)27-41
Antal sider15
ISSN0300-9483
DOI
StatusUdgivet - jan. 2023

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