Journal
QUATERNARY RESEARCH
Volume 72, Issue 2, Pages 301-308Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1016/j.yqres.2009.05.006
Keywords
Radiocarbon dating; Carbon reservoir; Hardwater effect; Rice Lake, North Dakota; Cottonwood Lake, South Dakota; Devils Lake, Wisconsin; Chatsworth Bog, Illinois; Global Pollen Database; NEOTOMA database
Funding
- National Science Foundation [BSR-8614916, EAR-0622289, EAR-9905327]
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Although the carbon-reservoir problem with bulk-sediment radiocarbon dates from lakes has long been recognized, many synoptic studies continue to use chronologies derived from such dates. For four sites in central North America, we evaluate chronologies based on conventional radiocarbon dates from bulk sediment versus chronologies based on accelerator mass spectrometry (AMS) radiocarbon dates from terrestrial plant macrofossils. The carbon-reservoir error varies among sites and temporally at individual sites from 0 to 8000 yr. An error of 500-2000 yr is common. This error has important implications for the resolution of precise event chronologies. (C) 2009 University of Washington. Published by Elsevier Inc. All rights reserved.
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