Tag

metamorphic

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• 12 May 2026The Gneiss That Remembers: The Proterozoic Basement of the Gawler CratonBeneath South Australia's Gawler Craton lies 1.7-billion-year-old gneiss—rock once buried 25 kilometres deep, now exposed by tectonic uplift and erosion, that records the assembly of Proterozoic Austr