<i>In situ</i> LA-ICP-MS <sup>40</sup>Ar/<sup>39</sup>Ar isotopic age determination results. Using palaeomagnetic and isotopic data to investigate late to post-Caledonian tectonothermal processes within the Western Terrane of Svalbard Krzysztof Michalski Geoffrey Manby Krzysztof Nejbert Justyna Domańska-Siuda Mariusz Burzyński 10.6084/m9.figshare.4584874.v1 https://geolsoc.figshare.com/articles/dataset/_i_In_situ_i_LA-ICP-MS_sup_40_sup_Ar_sup_39_sup_Ar_isotopic_age_determination_results_Using_palaeomagnetic_and_isotopic_data_to_investigate_late_to_post-Caledonian_tectonothermal_processes_within_the_Western_Terrane_of_Svalbard/4584874 Supplementary data 4 - <i>in situ</i> LA-ICP-MS <sup>40</sup>Ar/<sup>39</sup>Ar isotopic age determination results 2017-01-25 09:39:25 LA-ICP-MS post-Caledonian tectonothermal processes Svalbard Supplementary data 4 Ar age determination results Western Terrane Geology