GEO— Essays on the geology of Australia.
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silver

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  • 26 June 2026The Hill of Pure Silver ChlorideA 60-metre hill of silver chloride at Broken Hill formed when 1.7-billion-year-old ore was enriched by a billion years of chemical weathering.
  • 18 June 2026The Lava That Became a Fossil Reef of Silver and Lead: New South Wales' Broken Hill Deposit: How 1.7-billion-year-old volcanic sediments in far-western New South Wales created the world's largest silver-lead-zinc deposit, a mound of metal that built an industry and still defies easy explana
  • 18 May 2026The Lava That Turned to Silver: Tasmania's Zeehan FieldHow 360-million-year-old Devonian volcanic vents in western Tasmania created one of the world's richest silver-lead-zinc fields, where hydrothermal fluids deposited ore in a dying rift.
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