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Dating scale

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Geologists count back more than 4 billion years to the oldest Earth materials. Have you ever tried to count to a million? Counting once per second easy at the start, but tough when you reach the hundred-thousand mark , 24 hours per day, seven days per week no weekends off , it would take you 11 days, 14 hours to count to one million! There are a thousand millions in a billion, so counting to a billion would take you approximately 32 years.
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Geologic time scale - Wikipedia

Geologic time spans are divided into units and subunits, the largest of which are eons. Eons are divided into eras, which are further divided into periods, epochs, and ages. Geologic dating is extremely imprecise. For example, although the date listed for the beginning of the Ordovician period is million years ago, it is actually Geologic dating allows scientists to better understand ancient history, including the evolution of plant and animal life from single-celled organisms to dinosaurs to primates to early humans. It also helps them learn more about how human activity has transformed the planet. Data from Geologic Time Scale of
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The geologic time scale GTS is a system of chronological dating that classifies geological strata stratigraphy in time. It is used by geologists , paleontologists , and other Earth scientists to describe the timing and relationships of events in geologic history. The time scale was developed through the study of physical rock layers and relationships as well as the times when different organisms appeared, evolved and became extinct through the study of fossilized remains and imprints.
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