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Proterozoic Eon, the younger of the two divisions of Precambrian time, extending from 2.5 billion to 541 million years ago. During the Proterozoic, the atmosphere and oceans changed significantly. Its rocks contain the fossil remains of bacteria and blue-green algae as well as the first oxygen-dependent animals.
Part 1: Hadean Earth – The Violent Creation of Our World. Part 2: Archean Earth – Signs of Life. Part 3: Proterozoic Earth – The First Animals. Part 4: Cambrian Earth – An Explosion of Evolution. Part 5: Ordovician Earth – Colonising a Barren Land. Part 6: Silurian Earth – The First Breath of Air.
Rocks formed during the Proterozoic Eon have fossil evidence of simple organisms, such as bacteria, algae, and wormlike animals. In the Phanerozoic Eon, the rocks formed have fossils of animals and plants such as dinosaurs, mammals, and trees. Scientists who study fossils are called palaeontologists.
24 sie 2024 · The Proterozoic Eon, meaning “earlier life,” comes after the Archean Eon and ranges from 2.5 billion to 541 million years old. During this time, most of the central parts of the continents had formed, and plate tectonic processes had started.
6 wrz 2016 · Geologic Time Scale Worksheet. Use the tables below to label the Eons and Eras on the timeline. Label these below the timeline and be sure to include: Vertical line with the year. Brackets to indicate beginning and end. Name of eon/era See ‘Hadean Eon’ example below. 4.6 BYA.
The Proterozoic Eon, meaning “earlier life,” is the eon of time after the Archean eon and ranges from 2.5 billion years old to 541 million years old. During this time, most of the central parts of the continents had formed and the plate tectonic process had started.
The Proterozoic Eon represents the younger half of the Precambrian and is defined as the period from the end of the Archean at 2500 Ma to the beginning of the Cambrian Period (ca. 544 ma ago).
