The Precambrian
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THE PRECAMBRIAN ERA
The Precambrian era started 4.6 billion years ago and ended 544 million years ago
Geologic events in the Precambrian era
4.6 billion years ago Earth is formed when dust and ice was pulled together by gravity.
4 billion years ago the oceans formed when Earth cooled down enough for water to accumulate a cause oceans before earth cooled it was so hot water could not accumulate.
3.8 billion years ago the oldest rock formed. The oldest rock formed when molten lava cooled and rose from ancient mid ocean ridges.
The Precambrian era started 4.6 billion years ago and ended 544 million years ago
Geologic events in the Precambrian era
4.6 billion years ago Earth is formed when dust and ice was pulled together by gravity.
4 billion years ago the oceans formed when Earth cooled down enough for water to accumulate a cause oceans before earth cooled it was so hot water could not accumulate.
3.8 billion years ago the oldest rock formed. The oldest rock formed when molten lava cooled and rose from ancient mid ocean ridges.
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Life development events in the Precambrian era 3.5 billon years ago the first simple cell organism formed. The first simple cell organism was bacteria.
2 billion years ago the first complex cell organism formed. The first complex cell organisms were algae.
600 million years ago jelly fish like animals evolve
570 million years ago Arthropods evolve. Arthropods are invertebrates that have an exoskeleton evolved.
544 million years ago the first mass extinction. The first mass extinction occurred when a massive climate change occurred killing 60% of life.
2 billion years ago the first complex cell organism formed. The first complex cell organisms were algae.
600 million years ago jelly fish like animals evolve
570 million years ago Arthropods evolve. Arthropods are invertebrates that have an exoskeleton evolved.
544 million years ago the first mass extinction. The first mass extinction occurred when a massive climate change occurred killing 60% of life.