Category:Precambrian
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日本語: 先カンブリア時代
The super eon Precambrian (Pre-Cambrian) is an informal name for the three eons of the geologic timescale that came before the current Phanerozoic eon. It spans from the formation of Earth around 4500 Ma (million years ago) to the evolution of abundant macroscopic hard-shelled animals, which marked the beginning of the Cambrian, the first period of the first era of the Phanerozoic eon, some 542 Ma.
Subcategories
This category has the following 9 subcategories, out of 9 total.
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BEG |
LP |
Media in category "Precambrian"
The following 73 files are in this category, out of 73 total.
