Category:Geology in the 1st-myr
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![](https://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Noun_project_528.svg/12px-Noun_project_528.svg.png)
English: The time specified does not have to be exact, but gives an approximate time frame
Subcategories
This category has the following 4 subcategories, out of 4 total.