An eon if a generally accepted as 1 billion years.
The geologic time scale is divided into eons. The eons are broken down into eras, which then are broken down into periods. I will list the correct divisions below. Eons: Phanerozi, Proterozoic, Archean Eras: (Phanerozic): Cenozoic, Mesozoic, Paleozoic (Proterozoic):Neoproterozoic, Mesoproterozoic, paleoproterozoic (Archean): Neoarchean, Mesoarchean, Paleoarchean, Eoarchean (Cenozoic)Quaternary, Neogene,Paleogene (Mesozoic)Cretaceous, Jurassic, Triassic (Paleozoic)Permian, Carboniferous, Devonian, Silurian, Ordovician, Cambrian (Neoproterozoic)Ediacaran, Cryogenian, Tonian (Mesoproterozoic)Stenian, Ectasian, Calymmian (Paleoproterozoic)Statherian, Orosirian, Rhyacian, Siderian
Historians use time and place to use time periods. Time tells when and place details where. A time line is often created to pinpoint specific points in time in regards to events and persons of interest.
The Vikings are at 831 AD (2 o'clock on the time device).
North America is behind Europe in time.
4.6 billion years 5 billion years
Eons, Eras,Epochs, and period
Eons is a noun. It's the plural form of eon, and it means a very long time.
An eon. There 5 eons of time.
Four eons comprise Earth's geological time scale. Other time intervals of the Earth are eras, periods, and epochs.
aeon, ages, time period, years
Mezoic Time
By eons, eras, epochs, and periods.
Time. The game.
eons
supereon, composed of multiple eons
Eons
Eons I believe. Hope that helped! =)