568f784c-1757-e7a0-e063-3050940af7ef 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/13608744 Paleomagnetic, paleointensity and rock-magnetic data from the AZ16 section of the Eocene Peshtasar volcanic succession in the Talysh Mountains, southeastern Azerbaijan 2026-07-10 creation http://data.bgs.ac.uk/id/dataHolding/13608744 The dataset relates to the AZ16 section of the Eocene Peshtasar volcanic succession in the Talysh Mountains, southeastern Azerbaijan. It contains data from 25 volcanic cooling units divided into three stratigraphically organised paleomagnetic directional groups. The deposited files include specimen-level paleointensity experimental data, paleomagnetic directional data, rock-magnetic measurements, methodological information and file-level metadata. Paleointensity estimates were obtained using thermal Thellier, microwave, pseudo-Thellier, double-heating Shaw and Triaxe methods. The resulting dataset was used to test whether the three directional groups record systematic differences in geomagnetic field strength. The accepted results show moderate-to-strong fields for Groups 1 and 2 and a substantially weaker field for Group 3, providing evidence for coupled directional and intensity changes during Eocene geomagnetic secular variation. The data relate to the AZ16 volcanic section of the Eocene Peshtasar Formation in the Talysh Mountains of southeastern Azerbaijan, close to the western margin of the South Caspian Basin. Sampling sites AZ16A-Z extend through the Peshtasar volcanic succession west and southwest of Yardimli. Data supports the manuscript 'Extreme Eocene secular variation revealed by coupled paleomagnetic directional and paleointensity changes in the Talysh volcanic succession' Dr Simon Lloyd University of Liverpool not available originator Dr Rebecca Hopkins University of Liverpool not available originator Joseph Brabin University of Liverpool not available originator Makayla Riviera University of Liverpool 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/568f784c-1757-e7a0-e063-3050940af7ef.png Geology GEMET - INSPIRE themes, version 1.0 2008-06-01 publication Eocene Palaeomagnetism Geomagnetic fields BGS Thesaurus of Geosciences 2022 revision Citable Data 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 2023-07-05 2026-07-01 Text file (TXT) Comma-Separated Values (CSV) file (.csv) Enquiries British Geological Survey United Kingdom not available distributor https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item192729 WWW:DOWNLOAD-1.0-http--download Data download https://doi.org/10.5285/01e58188-315a-4f62-8a51-faaf78144ce4 WWW:LINK-1.0-http--related Citation Information - Digital Object Identifier (DOI) Lloyd, S., Hopkins, R., Brabin, J., Riviera, M. (2026). Palaeomagnetic, palaeointensity and rock-magnetic data from the AZ16 section of the Eocene Peshtasar volcanic succession in the Talysh Mountains, southeastern Azerbaijan. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/01e58188-315a-4f62-8a51-faaf78144ce4 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 Samples from the AZ16 Peshtasar volcanic succession were analysed using paleomagnetic, rock-magnetic, microscopy and multi-method paleointensity techniques. Magnetic mineralogy and thermal stability were assessed using hysteresis, thermomagnetic magnetisation and susceptibility measurements, scanning electron microscopy and EDX. Absolute paleointensity estimates were obtained using thermal Thellier, microwave, double-heating Shaw, pseudo-Thellier and Triaxe methods. Thellier-type experiments used IZZI+ protocols with pTRM checks. Results were screened using directional and method-specific reliability criteria, and only accepted specimen-level estimates were retained for site- and group-level interpretation.