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U-Pb zircon ages of volcanic ashes integrated with ammonite biostratigraphy, Fernie Formation (Jurassic), Western Canada:
supplementary data files
; Pana, D I; Poulton, T P; Heaman, L M. Geological Survey of Canada, Open File 8472, 2018, 2 pages, https://doi.org/10.4095/313116