DSpace
 

Researchspace >
General science, engineering & technology >
General science, engineering & technology >
General science, engineering & technology >

Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/2035

Title: Further attempts at dating the palynological sequence of the Hula Lo7 core, upper Jordan Valley, Israel
Authors: Weinstein-Evron, M
Vogel, JC
Kronfeld, J
Keywords: Paleoclimate Jerusalem
Basin
Record
Issue Date: 2001
Publisher: University of Arizona Department of Geosciences
Citation: Weinstein-Evron, M, et al. 2001. Further attempts at dating the palynological sequence of the Hula Lo7 core, upper Jordan Valley, Israel. Radiocarbon, vol. 43(2B), pp 561-570
Abstract: The palynological sequence of the Hula L07 core was previously correlated with the global oxygen isotope stages 3-5, based on a radiocarbon age determination and comparison with other Levantine paleoclimatological curves. An attempt was made to validate this correlation with Th/U dating. Unlike typical European peat, which is acidic, the soil pH of the Hula peat is mildly basic. Not only does this contribute to the oxidation of palynomorphs, but it also helps to preserve the carbonate material that can be a variable mixture of allogenic, endogenic, and authigenic components, each component may represent a different degree of uranium series disequilibrium. The thorium (Th-232) concentrations of the carbonate are low. Total digestion or acid leach of the sample may not always enable the proper correction for initial thorium. The dating derived from a NaOH-extraction of the organic material, while giving apparently better ages, also suffers from the presence of the carbonate admixture. It appears that, while C-14 dating can be considered suitable for the younger portions of the core, techniques based upon the U-series may not be as efficacious in dating this important record of climatic change.
URI: http://hdl.handle.net/10204/2035
http://hdl.handle.net/10204/2035
ISSN: 0033-8222
Appears in Collections:Climate change
General science, engineering & technology

Files in This Item:

File Description SizeFormat
weinstein-evron_2001.pdf293.26 kBAdobe PDFView/Open
View Statistics

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback