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Simplified stratigraphy and chemostratigraphy of Ediacaran sedimentary rocks in northwestern Canada and Oman. Sampled horizons indicated with stars and compilation of carbon isotope data are in SI Appendix, Table S1. Previously published geochronological constraints are from U-Pb zircon ages on ash beds (21) and Re-Os ages on organic-rich sedimentary rocks (22). Fm, Formation.
