Sedimentation rates in Baffin Island fiord cores from comparative radiocarbon dates ( Canada).

J. T. Andrews, A. J.T. Jull, D. J. Donahue, S. K. Short, L. E. Osterman

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Five accelerator (TAMS system, University of Arizona) radiocarbon dates on small (30-50 mg) paired bivalves or shell fragments have been obtained on two piston cores. These dates are compared with conventional and accelerator 14C dates on the total organic fraction (<2 mu m size fraction) from similar levels in the two cores. The shell dates are always younger by several thousands of years. We argue that the shell dates are the more reliable as pre-Quaternary pollen is abundant in the lowermost 6 m in core HU77-159 from Frobisher Bay. We have therefore developed an empirical relation that enables us to change dates on organic matter to a more probable 'true' age. Concludes that sedimentation rates were highest between ca. 9000 and 6500 years BP, a time when fiord glaciers in Baffin Island were undergoing substantial retreat. - from Authors

Original languageEnglish (US)
Pages (from-to)1827-1834
Number of pages8
JournalCanadian Journal of Earth Sciences
Volume22
Issue number12
DOIs
StatePublished - Jan 1 1985
Externally publishedYes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

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