Precambrian
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The Precambrian is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon,
Weathered Precambrian pillow lava in the Temagami Greenstone Belt of the Canadian Shield
![Landmass positions near the end of the Precambrian[citation needed][original research?]](https://upload.wikimedia.org/wikipedia/commons/thumb/2/22/Positions_of_ancient_continents%2C_550_million_years_ago.jpg/500px-Positions_of_ancient_continents%2C_550_million_years_ago.jpg)
Landmass positions near the end of the Precambrian[citation needed][original research?]
Cambrian
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The Cambrian is the first geological period of the Paleozoic Era and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding Ediacaran period 538.8 Ma to the beginni
Precambrian
…pꞒ or PreꞒ) is the earliest part of Earth's history, set before the current Phanerozoic Eon. The Precambrian is so named because it preceded the Cambrian, the first period of the Phanerozoic Eon, which is named after Cambria, the Latinized name for Wales, where rocks from this age were first studied. The…
Ediacaran–Cambrian boundary section at Fortune Head, Newfoundland, GSSP
Diorama of the Burgess Shale Biota
Archeocyathids from the Poleta formation in the Death Valley area
Stromatolites of the Pika Formation (Middle Cambrian) near Helen Lake, Banff National Park, Canada