Climatic fluctuations recorded in the sediment fillings of Loch Sunart (northwestern Scotland) since 20,000 BP.

Zohra Mokeddem, Agnes Baltzer, Martine Clet-Pellerin, Anne Veronique Walter-Simonnet, C Richard Bates, Yvon Balut, Chantal Bonnot-Courtois

Research output: Contribution to journalArticlepeer-review

Abstract

Over the last 20,000 yr, Loch Sunart has accumulated an important record of Late Pleistocene and Holocene sedimentation characteristic of sea lochs on the western coast of Scotland. A seismic survey conducted using a Seistec Boomer system has demonstrated five distinct sediment-acoustic facies in the loch. These facies have been correlated with sediment sequences identified in a long Calypso core (12 m) acquired from the RV Marion Dufresne. Grain-size and pollen analyses, accompanied with three C-14 dates, have yielded information on the patterns of sedimentation since the Late Glacial Maximum. In addition, these data have identified three significant cooling events since the Younger Dryas: 8200, 5500 and 3500 cal. yr BP and. the Little Ice Age.

Original languageEnglish
Pages (from-to)150-160
Number of pages11
JournalComptes Rendus Geoscience
Volume339
Issue number2
DOIs
Publication statusPublished - Feb 2007

Keywords

  • sedimentation
  • pollen
  • C-14
  • Seistec Boomer
  • seismic facies
  • cooling events
  • palaeoenvironments
  • RADIOCARBON AGE CALIBRATION
  • GLACIER FLUCTUATIONS
  • WESTERN SCOTLAND
  • NORTH-ATLANTIC
  • SEA LOCH
  • HOLOCENE
  • EVENT
  • VARIABILITY

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