Bevins, Richard Atkinson, Nicola Ixer, Rob Evans, Jane Data Table. U–Pb zircon age constraints for the Ordovician Fishguard Volcanic Group and further evidence for the provenance of the Stonehenge bluestones Data Table Stonehenge;constraint;Ordovician Fishguard Volcanic Group;provenance;data Table;zircon;evidence;bluestone;Data;Geology 2016-10-19
    https://geolsoc.figshare.com/articles/journal_contribution/Data_Table_U_Pb_zircon_age_constraints_for_the_Ordovician_Fishguard_Volcanic_Group_and_further_evidence_for_the_provenance_of_the_Stonehenge_bluestones/4040277
10.6084/m9.figshare.4040277.v1