geologicaltravels:2011: The golden spike annotating the Global Boundary Stratotype Section and Point
geologicaltravels:2011: The golden spike annotating the Global Boundary Stratotype Section and Point defining the base of the Ediacaran period (approx 640 Ma). The Edicaran is the the first geological period to be defined in 120 years. Brachina Gorge, Flinders Ranges. -- source link
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