Show simple item record

dc.contributor.authorDavidson, Gregg R.
dc.contributor.authorCarnley, Meredith
dc.contributor.authorLange, Todd
dc.contributor.authorGalicki, Stanley J.
dc.contributor.authorDouglas, Andrew
dc.date.accessioned2021-02-11T21:45:24Z
dc.date.available2021-02-11T21:45:24Z
dc.date.issued2004-01-01
dc.identifier.citationDavidson, G. R., Carnley, M., Lange, T., Galicki, S. J., & Douglas, A. (2004). Changes in sediment accumulation rate in an oxbow lake following late 19th century clearing of land for agricultural use: a 210Pb, 137Cs, and 14C study in Mississippi, USA. Radiocarbon, 46(2), 755-764.
dc.identifier.issn0033-8222
dc.identifier.doi10.1017/S0033822200035797
dc.identifier.urihttp://hdl.handle.net/10150/654749
dc.descriptionFrom the 18th International Radiocarbon Conference held in Wellington, New Zealand, September 1-5, 2003.
dc.description.abstractSediment cores were collected from 2 sites in the forested fringe of an oxbow lake surrounded by land that was converted from forest to agricultural use in the late 19th century. The 2 sampling areas were selected to represent areas of high (West site) and low (east site) current sediment accumulation rates, based on distance from a perennially discharging stream. Modern (post settlement and land clearing) sediment accumulation rates were calculated using 210Pb and 137Cs on bulk sediment samples from 2 cores from each site. Two additional cores were collected from each site for radiocarbon analysis of twig cellulose with the assumption that most twigs in the sediment within the forested fringe fell from overhead and are contemporaneous with the sediment. Only the West site, however, yielded sufficient identifiable twig material for analysis. Modern sediment accumulation rates based on 210P and 137Cs fall between 0.2-0.4 cm/yr at the East site, and 0.7-1.3 cm/yr at the West site (nearest the stream inlet), with approximate agreement between the 210Pb and 137Cs methods. Modern sediment accumulation rate based on bomb-pulse 14C activity of twigs from cores from the West site is approximately 1.0 cm/yr, in agreement with the 210Pb and 137Cs results results. Historic sediment accumulation rates were estimated at the West site using twigs from deeper intervals with pre-bomb 14C activity. Sediment covering approximately 1000 yr of pre-settlement sediment accumulation exhibited evidence of minor bioturbation or in-washing of reworked material, but with a clearly lower accumulation rate of less than 0.1 cm/yr.
dc.language.isoen
dc.publisherDepartment of Geosciences, The University of Arizona
dc.relation.urlhttp://radiocarbon.webhost.uits.arizona.edu/
dc.rightsCopyright © by the Arizona Board of Regents on behalf of the University of Arizona. All rights reserved.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectabsolute age
dc.subjectalkali metals
dc.subjectBelzoni Mississippi
dc.subjectC 14
dc.subjectcarbon
dc.subjectCenozoic
dc.subjectcesium
dc.subjectchronostratigraphy
dc.subjectcores
dc.subjectCs 137
dc.subjectdates
dc.subjectdeforestation
dc.subjectHolocene
dc.subjecthuman activity
dc.subjectHumphreys County Mississippi
dc.subjectisotopes
dc.subjectlead
dc.subjectmetals
dc.subjectMississippi
dc.subjectpaleoenvironment
dc.subjectpaludal environment
dc.subjectPb 210
dc.subjectQuaternary
dc.subjectradioactive isotopes
dc.subjectsedimentation
dc.subjectsedimentation rates
dc.subjectsediments
dc.subjectSky Lake
dc.subjectterrestrial environment
dc.subjectUnited States
dc.subjectupper Holocene
dc.titleChanges in Sediment Accumulation Rate in an Oxbow Lake Following Late 19th Century Clearing of Land for Agricultural Use: A 210Pb, 137Cs, and 14C Study in Mississippi, USA
dc.typeProceedings
dc.typetext
dc.identifier.journalRadiocarbon
dc.description.collectioninformationThe Radiocarbon archives are made available by Radiocarbon and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information.
dc.eprint.versionFinal published version
dc.description.admin-noteMigrated from OJS platform February 2021
dc.source.volume46
dc.source.issue2
dc.source.beginpage755
dc.source.endpage764
refterms.dateFOA2021-02-11T21:45:24Z


Files in this item

Thumbnail
Name:
4208-3879-1-PB.pdf
Size:
193.3Kb
Format:
PDF

This item appears in the following Collection(s)

Show simple item record