Search results for " 14C AMS"

showing 4 items of 4 documents

Du Néolithique récent à l’âge du Bronze dans le Centre Nord de la France : les étapes de l’évolution chrono-culturelle

2011

Die seit 2001 im Rahmen eines PCR (Programme Collectif Régional) durchgeführte Gemeinschaftsarbeit über das Ende des Neolithikums und den Beginns der Bronzezeit im Zentrum Nordfrankreichs führt heute zu einer neuen Periodisierung der Zeit zwischen 3600 und 1800 v. Chr. in acht Etappen. Obwohl, insbesondere bezüglich der Transition zwischen dem Mittel-und dem Jungneolithikum einerseits und dem Jung-und dem Endneolithikum andererseits, auch weiterhin einige Lücken bestehen, erlaubt dieser präzisere Rahmen die Hauptetappen im Zentrum Nordfrankreichs mit denen der benachbarten Regionen zu synchronisieren, um eine dynamischere Vision der kulturellen Phänomene vorzuschlagen.

010506 paleontology060102 archaeologyCampaniformemedia_common.quotation_subjectNéolithiqueJungneolithikum ; Endneolithikum ; Frühbronzezeit ; Chronologie ; Zentrum Nordfrankreichs06 humanities and the artsArt01 natural sciences[SHS]Humanities and Social SciencesLate Neolithic ; central part of northern France ; Chronology ; Early Bronze Age ; Final NeolithicChronologie 14C AMSAge du BronzeBronze Age[ SHS ] Humanities and Social Sciences0601 history and archaeologyPharmacology (medical)[SHS] Humanities and Social SciencesBronze ancien ; Néolithique récent ; Néolithique final ; chronologie ; Centre Nord de la FranceHumanitiesNord de la FranceComputingMilieux_MISCELLANEOUS0105 earth and related environmental sciencesmedia_common
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(Table 1) Age determination of sediment core SO147_106KL

2005

Here we present a high-resolution marine sediment record from the El Niño region off the coast of Peru spanning the last 20,000 years. Sea surface temperature, photosynthetic pigments, and a lithic proxy for El Niño flood events on the continent are used as paleo-El Niño-Southern Oscillation proxy data. The onset of stronger El Niño activity in Peru started around 17,000 calibrated years before the present, which is later than modeling experiments show but contemporaneous with the Heinrich event 1. Maximum El Niño activity occurred during the early and late Holocene, especially during the second and third millennium B.P. The recurrence period of very strong El Niño events is 60-80 years. El…

Age datedPiston corer (BGR type)SonneAge maximum/oldAge minimum/youngLaboratory code/labelAge dated error to youngerAge dated error to olderAge 14C calibratedDEPTH sediment/rockSO147Age 14C AMSAge model
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(Table 1) Age determination of sediment profile SO90-41KL/63KA

2002

The 14C ages of planktonic foraminifers Globigerinoides sacculifer bracketing the Younger Dryas in a d18O record of Globigerinoides ruber from a laminated sediment core on the Pakistani continental margin suggest that surface reservoir ages in the Arabian Sea were in excess of 1000 years during the deglaciation. A least squares error fit of a detailed 14C chronology to the (atmospheric) tree ring record gave variable early Holocene reservoir ages between 780 and 1120 years, well above the prebomb value of 640 years. Mid-Holocene reservoir ages are less well constrained but were probably closer to the prebomb value. The method used to fit individual core sections to the tree ring record was …

SO90SectionCalendar ageReservoir age standard errorAge 14C calibratedDEPTH sediment/rockAge commentAge dated materialAge datedSonneAge dated standard deviationReservoir ageAge 14C AMSComposite Core
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(Table 2) Age determination of sediment core NIOP-C2_929

2007

In this study we present a sea surface temperature (SST) record from the western Arabian Sea for the last 20,000 years. We produced centennial-scale d18O and Mg/Ca SST time series of core NIOP929 with focus on the glacial-interglacial transition. The western Arabian Sea is influenced by the seasonal NE and SW monsoon wind systems. Lowest SSTs occur during the SW monsoon season because of upwelling of cold water, and highest SSTs can be found in the low-productivity intermonsoon season. The Mg/Ca-based temperature record reflects the integrated SST of the SW and NE monsoon seasons. The results show a glacial-interglacial SST difference of ~2°C, which is corroborated by findings from other Ar…

Sample amountCalendar ageDepth top/minDEPTH sediment/rockAge 14C calibrated CALIB (Stuiver & Reimer 1993)Age commentAge datedAge dated materialSize fractionTyroAge 14C calibrated CALIB (Stuiver & Reimer 1993)Age dated standard deviationDepth bottom/maxCoreAge 14C AMSNIOP-C2
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