Journal
RADIOCARBON
Volume 58, Issue 4, Pages 869-883Publisher
UNIV ARIZONA DEPT GEOSCIENCES
DOI: 10.1017/RDC.2016.71
Keywords
marine C-14 reservoir effect; Cantabrian coast; Late Pleistocene; Early Holocene
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Funding
- Spanish Ministry of Economy and Competitiveness [HAR2010-22115-C02-01, HAR2013-46802-P]
- Newton International Fellowship [NF100413]
- Juan de la Cierva Research Programme of the Spanish Ministry of Economy and Competitiveness [JCI-2012-12094, IJCI-2014-20590]
- NERC Radiocarbon Facility [NF/2012/1/18]
- NERC [NRCF010002] Funding Source: UKRI
- Natural Environment Research Council [NRCF010002] Funding Source: researchfish
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Radiocarbon dating of closely associated marine mollusk shells and terrestrial material (mammal bones or charred wood) collected from archaeological contexts in northern Atlantic Iberian coastal areas is used to quantify the marine C-14 reservoir effect (Delta R) for the coastal waters off the Cantabrian coast of northern Iberia. For the first time, Delta R values were reliably determined for these coastal waters and, also for the first time, a Delta R was calculated for the Late Pleistocene in Atlantic Iberia. Pairs of coeval samples of different carbon reservoirs selected from Upper Paleolithic (Late Pleistocene) and Mesolithic (Early Holocene) contexts yielded.R weighted mean values of -117 +/- 70 C-14 yr and -105 +/- 21 C-14 yr, respectively. These values show oceanographic conditions characterized by a reduced offset between atmospheric and surface water C-14 contents, suggesting a nonexistent or very weak upwelling and some stratification of the water column. Similar oceanographic conditions have been recorded in other areas of Atlantic Iberia during the Holocene, such as off Andalusian and northwestern Galician coasts. Results not only provide useful information on environmental conditions but also a framework to obtain more precise and reliable absolute chronologies for the Late Pleistocene and Early Holocene in northern Iberia.
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