Schwenninger, J., Toms, P. S., Duller, G. A T., Brown, A. and Basell, L. (2013). Chard Junction Quarry, Somerset: Optical Stimulation Luminescence Dating of the Proto-Axe . Fort Cumberland: Historic England. https://doi.org/10.5284/1041327. Cite this using datacite

Title The title of the publication or report Title:	Chard Junction Quarry, Somerset: Optical Stimulation Luminescence Dating of the Proto-Axe
Series The series the publication or report is included in Series:	Historic England Research Reports
Downloads Any files associated with the publication or report that can be downloaded from the ADS Downloads:	englishh2-147070_1.pdf (5 MB) : Download
Licence Type ADS, CC-BY 4.0 or CC-BY 4.0 NC. Licence Type:	ADS Terms of Use and Access
DOI The DOI (digital object identifier) for the publication or report. DOI	https://doi.org/10.5284/1041327
Publication Type The type of publication - report, monograph, journal article or chapter from a book Publication Type:	Report (in Series)
Abstract The abstract describing the content of the publication or report Abstract:	The deposits of the proto-Axe at Chard Junction Quarry potentially contain evidence of the earliest hominin occupation of southwest Britain and, along with Broom and Kilmington, represent one of the longest terrestrial records of Palaeolithic occupation in Britain. The aim of this report is to summarise and assess the reliability of the optical chronology of the sediment sequence within the Hodge Ditch excavations. The analytical properties of the age estimates are evaluated, with intrinsic measures and a tri-laboratory inter-comparison conducted to assess reliability. The raw optical chronology is refined substantially by rejection of those age estimates accompanied by analytical caveats, driven principally by poor recycling ratios in the high, saturating region of dose response. One of two inter-laboratory samples produced a significantly different age by one laboratory, which may be caused by the differences in laboratory thermal treatment. The reliability of De:Dr plots may improve with increasing numbers of samples from equivalent stratigraphic units of divergent dosimetry, but having only two samples may lead to erroneous conclusions. Rapid sedimentation and deposition of artefacts between c 15.2m and 4.5m appears centred on a geometric mean age of 259±10ka (MIS 7).There then followed relatively slow or pulsed sedimentation until 86ka (MIS 5a) beyond which the deposits were incised to form the current course of the River Axe.
Author The authors of this publication or report Author:	Jean-Luc Schwenninger P S Toms Geoffrey A T Duller Andrew Brown L Basell
Publisher The publisher of the publication or report Publisher:	Historic England
Other Person/Org Other people or organisations for this publication or report Other Person/Org:	Historic England (OASIS Reviewer) Dorset SMR (OASIS Reviewer)
Year of Publication The year the book, article or report was published Year of Publication:	2013
Locations Any locations covered by the publication or report. This is not the place the book or report was published. Locations:	Site: Chard Junction Quarry County: Dorset District: Dorset Parish: THORNCOMBE Country: England Grid Reference: 334850, 104750 (Easting, Northing)
Subjects / Periods Subjects / Periods associated with this record. Subjects / Periods:	PALAEOLITHIC (Historic England Periods) PALAEOCHANNEL (Monument Type England) FIELD SURVEY (Event)
Identifiers Identifiers associated with the publication. These might include DOIs, site codes, Monument Identifiers etc. Identifiers:	OASIS Id: englishh2-147070 OBIB: 7/2013
Note Extra information on the publication or report. Note:	A4 heat-bound report
Source Where the record has come from or which dataset it was orginally included in. Source:	OASIS (OASIS)
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Created Date The date the record of the pubication was first entered Created Date:	18 Aug 2017

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