Geological Time Scale divisions explained in terms of Eons, Eras, Periods, Epochs, and Fossils.
Eon: The largest unit of geologic time, spanning billions of years and divided into subunits called eras, periods, and epochs.
Epoch: The smallest unit of geologic time, spanning thousands to millions of years.
Era: A major division of geologic time that is subdivided into periods and epochs.
Period: A subdivision of eras into smaller units of time.
Fossil: A preserved remnant or impression of an organism that lived in the past.
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