COLLINS, ALANS. BUCHAN, CRAIG Provenance and age constraints of the South Stack Group, Anglesey, UK: U–Pb SIMS detrital zircon data. <p>U–Th–Pb Secondary Ion Mass Spectrometry (SIMS) data from detrital zircons extracted from the South Stack Group, Anglesey, UK, indicate that: (1) the maximum depositional age of the Holyhead Formation (South Stack Group, Monian Supergroup) is 501 ± 10 Ma; (2) the Monian Supergroup was deposited between <strong><em>c.</em></strong> 500 and 475 Ma and is part of the Cambrian–Lower Ordovician succession found in southern Britain and Ireland; (3) Avalonia was a major sediment source (age maxima at 543–552 and 604–627 Ma); (4) Amazonia probably also provided zircons (common Neoarchaean–Mesoproterozoic grains) weakening suggestions that Avalonia had rifted off Gondwana by Cambrian times. </p> South Stack Group;Avalonia;SIMS;detrital;data;Monian Supergroup;Ion Mass Spectrometry;Anglesey;zircon;UK;Cambrian;Geology 2016-06-21
    https://geolsoc.figshare.com/articles/dataset/Provenance_and_age_constraints_of_the_South_Stack_Group_Anglesey_UK_U_Pb_SIMS_detrital_zircon_data_/3454244
10.6084/m9.figshare.3454244.v1