Differences
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| history:evolution_australia [2026/06/12 07:02] – [Archaean] gary1 | history:evolution_australia [2026/06/24 01:58] (current) – [Archaean] gary1 |
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| ====Archaean ==== | ====Archaean ==== |
| *3500-2800mya: **Australian Shield forms** from cooling molten rock 4.5km thick and covering more than half of the Australian continent which later became fractured into cratons c2300mya | *3500-2800mya: **Australian Shield forms** from cooling molten rock 4.5km thick and covering more than half of the Australian continent which later became fractured into cratons c2300mya |
| *c2700mya: "Miralga impact structure" impact crater near Marble Bar in Pilbara region WA which hit 2.77bya lava and 3.47bya sedimentary rock | *c3000mya: North Pole Dome impact crater, Miralga, about 1,600 kilometres north of Perth, oldest known impact crater on earth (([[https://www.abc.net.au/news/2026-06-24/worlds-oldest-asteroid-crater-pilbara-confirmed/106818546]])) |
| *2700mya: Wave Rock in WA is thought to have been created with its current form due to erosion since then | *2700mya: Wave Rock in WA is thought to have been created with its current form due to erosion since then |
| *2600-2450mya: in the Pilbara, banded iron formations first started to form about 2.6 to 2.45bya when the Pilbara was thought to be joined to South Africa on the edge of the first massive supercontinent known as Vaalbara. It then went though a period of iron mineralisation about 2.2 to 2 billion years ago when the supercontinent started to break up. | *2600-2450mya: in the Pilbara, banded iron formations first started to form about 2.6 to 2.45bya when the Pilbara was thought to be joined to South Africa on the edge of the first massive supercontinent known as Vaalbara. It then went though a period of iron mineralisation about 2.2 to 2 billion years ago when the supercontinent started to break up. |
