Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs40623-019-1060-4/MediaObjects/40623_2019_1060_Fig1_HTML.png)
Map of ICEPMAG sites with bedrock geology and regional boundaries. All ICEPMAG sampling site locations. Regional boundaries defined by country subdivision code ISO 3166-2:2013. Tectonic geology map adapted from Jóhannesson and Sæmundsson (2009) based on data publicly available from The Icelandic Institute of Natural History (open license: http://www.ni.is/rannsoknir/landupplysingar/skilmalar)