562fb4fc-4a5b-7342-e063-3050940acd4e 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 2026-08-25 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608740 Triaxial deformation experiment datafiles to test two methods of measuring yield strength of porous mudstones and sandstones 2026-07-01 creation http://data.bgs.ac.uk/id/dataHolding/13608740 The datafiles are text files that record the pore fluid pressure, confining pressure, pore volume change, axial force and axial load displacement recorded on the triaxial deformation apparatus during an axial load cycle on a porous rock sample. Each data file represents an individual load cycle from the contact of the loading apparatus to the yield strength, as identified by the user during the experiment. Samples tested included members of the Idaho Gray Sandstone, Mercia Mudstone Group, and lab manufactured synthetic sandstones. The data is associated with submission of the manuscript: 'Porous rock yield strength mapping: single sample probing versus multi-sample conventional measurements.' to the journal Rock Mechanics and Rock Engineering. Professor Daniel Faulkner University of Liverpool Professor in Geology and Geophysics School of Environmental Sciences, 4 Brownlow Street Liverpool L69 3GP not available originator Isabel Ashman University of Liverpool Jane Herdman Building, 4 Brownlow Street Liverpool L69 3GP not available originator Michael J. Allen University of Liverpool not available originator John D. Bedford Jacobs not available originator Elliot Rice-Birchall Shell 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/562fb4fc-4a5b-7342-e063-3050940acd4e.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Porosity Yield strength Strain Stress BGS Thesaurus of Geosciences 2022 revision NGDC Deposited Data Citable 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 2017-03-03 2026-02-27 Text file (TXT) Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item192627 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.5285/12387842-3003-46cc-9b0c-dbae48727c6d WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Ashman, I. R., Faulkner, D. R., Bedford, J. D., Rice-Birchall, E., Allen, M. J. (2026). Triaxial deformation experiment datafiles to test two methods of measuring yield strength of porous mudstones and sandstones. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/12387842-3003-46cc-9b0c-dbae48727c6d information 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 Data were collected in the Rock Deformation Laboratory at the University of Liverpool. The data on the Idaho Gray Sandstone were collected by Dr. J. Bedford between Mar 2017-Apr 2018. The data on the synthectic sandstones was conducted by Dr. E. Rice-Birchall between Jun 2019-Aug 2020. Finally, the Mercia Mudstone Group data were collected by Dr. I. Ashman in Jan & Feb 2026. The Idaho Gray Sandstones were investigated in Dr. John Bedford's PhD project and has been previously published in the Journal of Geophysical Research (Bedford et al., 2019). Similarly, the synthetic sandstone research project was included in Dr. Elliot Rice-Birchall's PhD and has been previously published in the International Journal of Rock Mechanics and Mining Sciences (Rice-Birchall et al., 2021). The Mercia Mudstone Group samples and data form part of NERC and NWS jointly funded GeoSafe consortium.