0f4c7754-48f2-3a60-e063-0937940a0705 English nonGeographicDataset non geographic dataset British Geological Survey +44 115 936 3100 Environmental Science Centre,Keyworth NOTTINGHAM NOTTINGHAMSHIRE NG12 5GG United Kingdom enquiries@bgs.ac.uk pointOfContact 2026-04-07 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608177 Bayesian age-depth model for sediment core of Lake Chalco, Mexico (40-0 kcal BP) (NERC Grant NE/S009035/1) 2024-01-17 creation http://data.bgs.ac.uk/id/dataHolding/13608177 A Bayesian age-depth model was constructed of the radiocarbon dates of the MexiDrill composite core. The age-depth model was produced using rbacon (Blaauw and Christen 2011, Bayesian Analysis 6(3): 457-474, doi: 10.1214/11-BA618), and was run in R as rbacon (CRAN version 3.2.0) using all default settings except for: thick=0.2, depth.units="m", ka=TRUE, acc.mean=2000. The output consists of a pdf of the age-depth model and its settings, a file containing the 95% age ranges, medians and means for every 0.1m of the core depths, a settings file and the .csv file that was used to produce the age-depth model. During the age-modelling, rbacon used the IntCal20 northern hemisphere terrestrial calibration curve (Reimer et al. 2020, Radiocarbon 62, 725-757, doi:10.1017/RDC.2020.41). Dr Maarten Blaauw Queens University Belfast not available originator Enquiries British Geological Survey United Kingdom not available distributor Enquiries British Geological Survey United Kingdom not available pointOfContact notApplicable https://resources.bgs.ac.uk/images/geonetworkThumbs/0f4c7754-48f2-3a60-e063-0937940a0705.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Carbon dating Age determination methods BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data dataCentre NERC_DDC otherRestrictions licenceOGL Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" otherRestrictions The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused. Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]" English geoscientificInformation 2018-07-01 2023-06-30 PDF witheld Text file (TXT) witheld Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item183595 WWW:DOWNLOAD-1.0-http--download Data download nonGeographicDataset non geographic dataset INSPIRE Implementing rules laying down technical arrangements for the interoperability and harmonisation of Geology 2011 publication See the referenced specification false Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 publication See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF false The (uncalibrated) radiocarbon dates and their associated (composite, event-free) depths were input into the Bayesian age-depth modelling software Bacon (Blaauw an Christen 2011 DOI: 10.1214/11-BA618), using the open-source CRAN R package rbacon (https://cran.r-project.org/package=rbacon; version 3.2.0). As calibration curve we used the northern hemisphere terrestrial curve IntCal20 (Reimer et al. 2020, doi:10.1017/RDC.2020.41). All used settings were defaults, except for: section thickness set to 0.2, prior mean accumulation rate 2000, depth units "m", years in kcal BP.