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Stonehenge Altar Stone Latest: Portable XRF analysis of Stenness and Brodgar stones indicates Altar Stone NOT sourced from Mainland Orkney. Previous results about 'Scottish' (Laurentian) source still apply so the search must continue... New paper by Bevins, Ixer et al. Was the Stonehenge Altar Stone from Orkney? Investigating the mineralogy and geochemistry of Orcadian Old Red sandstones and Neolithic circle monuments:
www.sciencedirect.com/science/article/pii/S2352409X24003663
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