Characteristics of the burial environment related to quartz SAR-OSL dating at St. Vincent Island, NW Florida, USA期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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Characteristics of the burial environment related to quartz SAR-OSL dating at St. Vincent Island, NW Florida, USA

Authors:	Gloria I Lpez W Jack Rink

Institution:	^aAGE Laboratory, School of Geography and Earth Sciences, McMaster University. 1280 Main Street West, Hamilton, Ontario, Canada L8S 4K1

Abstract:	St. Vincent Island, on the northwest Gulf coast of Florida, USA, preserves a well-developed beach ridge plain that began to form 4000 years ago based on inferred ages of pottery artefact assemblages. Seven vibra cores up to 2.88 m in length (uncompacted sediment) were retrieved from six ridges across the island. The single-aliquot regenerative-dose (SAR) procedure was used to obtain two optically stimulated luminescence (OSL) ages per core at different depths within each core. The geographically youngest ridges gave ages of 370±50–1900±300 years, yielding an inter-ridge accumulation time of 150 years assuming uniform sediment accumulation. The oldest ridge sets yielded ages of 2700±400–2800±300 years. Dating results are evaluated in terms of equivalent dose (D_E) distributions and other characteristics in relation to aspects of the burial environment, including pedogenesis.

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