This paper examines the suitability of fluvial deposits, some of which have been identified as flood levees, for dating by thermoluminescence (TL). It also compares the resulting TL dates with those based on the decay of excess 226Ra and on 14C.
Deception Island is the most likely volcanic source for the tephra. With direct 14C dating, age/depth curves, and cross-correlations at least 14 tephra horizons dating to between ca. 4 700 and 250 yr B.P. were identified and now form the basis
for a preliminary regional tephrochronology that will be a valuable dating tool for investigating the Holocene climatic history of Antarctica.
The objectives of this study is to construct the Holocene eustatic curve at the Nile delta coast and to correlate this curve with the evolutionary events of Holocene transgression. The analysis is based on carbon dating of shallow-water deltaic
Pollen analysis and five radiocarbon dates of a 687-cm core provide a detailed chronology of environmental change in a marsh at the head of Newport Bay, Orange County, California. Results and discussion.
C14dates obtained by accelerator mass spectrometry (AMS) on monospecific foraminiferal samples from two deep-sea sediment cores raised in the Indian sector of the southern Ocean have been corrected for the difference in C14 composition between
atmosphere and sea surface by using a reconstruction of the latitudinal C14 gradient which existed in the Southern Ocean prior to 1962. The corrected AMS-C14 data show a reduced sedimentation rates in core MD 84-527 between 25,000 and 10,000 yr B.P. For core
Datation C14 de 64 échantillons de pins subfossiles à la limite des arbres de la Laponie finlandaise ou au-delà. Les âges montrent une extension maximale de 6000 à 4000 BP. La détérioration climatique depuis 5000 BP est la principale raison de son
In this study, a section of Lake Emma basal sediments was sampled at three horizons for insect and plant macrofossils. Paleoecological analyses suggesting climatic conditions warmer than present and subsequent accelerator radiocarbon dates on wood
The analyses are based on C14dating, stratigraphic correlation, sedimentary facies and cycles and climatic changes as reflected by spore-pollen analysis. Six formations are recognised since the Mid late-Pleistocene and their lithological
British Columbia ; C14dating ; Canada ; Glacial features ; Glacier surges ; Lake level ; Little ice age ; Moraines ; Paleo-environment ; Proglacial lake
British Columbia ; Canada ; Crue glaciaire ; Datation C14 ; Glaciaire ; Lac proglaciaire ; Moraine ; Niveau lacustre ; Paléo-environnement ; Petit âge glaciaire
C14dating ; Microstructure ; New York State ; Paleo-ecology ; Paleo-environment ; Palynology ; Pollen diagrams ; Quaternary ; United States ; Wisconsinan
Datation C14 ; Diagramme pollinique ; Etats-Unis ; Microstructure ; New York State ; Palynologie ; Paléo-environnement ; Paléo-écologie ; Quaternaire ; Wisconsinien
Carbon fixed by phytoplankton and foraminifera is strongly influenced by old, glacial-derived CO2. Thus, reservoir corrections of up to 5 500 yr are needed for the C14dates. Iceberg turbation reworks foraminifera so that dates from resulting