41cf03f3-b7c5-9c7c-e063-3050940a34c6 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 2026-03-09 UK GEMINI 2.3 http://data.bgs.ac.uk/id/dataHolding/13608559 Volume and density measurements for obsidian 2025-10-20 creation http://data.bgs.ac.uk/id/dataHolding/13608559 This dataset contains Volume and density measurements for obsidian using helium pycnometry. The data was collected and analysed at the University of Liverpool for cored rhyolitic obsidian cylinders from Hrafntinnuhryggur, Iceland. The geographical location of the samples is here inconsequential for the dataset; the specific obsidian was chosen for its physical properties alone. The sample mass (using a scale) and geometry (using a caliper) of 7 representative samples of rhyolitic obsidian was measured, and the samples were analysed using a helium pycnometer, which measures volume, and correspondingly density when the sample mass is provided. The density of the rhyolitic obsidian was needed for the experiments in the study Seropian et al (2022). Jackie Kendrick LMU Munich 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/41cf03f3-b7c5-9c7c-e063-3050940a34c6.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Density Volcanic glass 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 2022-03-01 2022-03-31 Microsoft Excel (XLSX) witheld Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item190370 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 mass and geometry are direct measurements. The helium pycnometer outputs the measured volume (and correspondingly density when the sample mass is provided), and there is no further treatment of the data.