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

doi:10.1139/e85-194

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 journal › Article › peer-review

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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 language	English (US)
Pages (from-to)	1827-1834
Number of pages	8
Journal	Canadian Journal of Earth Sciences
Volume	22
Issue number	12
DOIs	https://doi.org/10.1139/e85-194
State	Published - 1985
Externally published	Yes

ASJC Scopus subject areas

General Earth and Planetary Sciences

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title = "Sedimentation rates in Baffin Island fiord cores from comparative radiocarbon dates ( Canada).",

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",

author = "Andrews, {J. T.} and Jull, {A. J.T.} and Donahue, {D. J.} and Short, {S. K.} and Osterman, {L. E.}",

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AU - Andrews, J. T.

AU - Jull, A. J.T.

AU - Donahue, D. J.

AU - Short, S. K.

AU - Osterman, L. E.

PY - 1985

Y1 - 1985

N2 - 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

AB - 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

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

Abstract

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