A1 Refereed original research article in a scientific journal
HOLOCENE FLOODPLAIN LAKE-SEDIMENTS IN THE AMAZON - C-14 DATING AND PALEOECOLOGICAL USE
Authors: RASANEN ME, SALO JS, JUNGNER H
Publisher: PERGAMON-ELSEVIER SCIENCE LTD
Publication year: 1991
Journal: Quaternary Science Reviews
Journal name in source: QUATERNARY SCIENCE REVIEWS
Journal acronym: QUATERNARY SCI REV
Volume: 10
Issue: 4
First page : 363
Last page: 372
Number of pages: 10
ISSN: 0277-3791
DOI: https://doi.org/10.1016/0277-3791(91)90037-U
Abstract
We think that the observed bias towards older C-14 ages documented in the gyttja clays is caused by the high proportion of old (fine particulate) organic matter being recirculated and resedimented within the suspension load, The strong fluvial control of lake sedimentation and the unreliability of the C-14 dates from the Amazon suspension-rich floodplains call for caution in palaeoecological interpretation. Furthermore, owing to the low number of within-lake replicate cores in the Amazon Holocene stratigraphy analyses, we consider the postulated Holocene climatic oscillation schemes to be tentative only.
We think that the observed bias towards older C-14 ages documented in the gyttja clays is caused by the high proportion of old (fine particulate) organic matter being recirculated and resedimented within the suspension load, The strong fluvial control of lake sedimentation and the unreliability of the C-14 dates from the Amazon suspension-rich floodplains call for caution in palaeoecological interpretation. Furthermore, owing to the low number of within-lake replicate cores in the Amazon Holocene stratigraphy analyses, we consider the postulated Holocene climatic oscillation schemes to be tentative only.
UTU Research Portal