The longest division of geologic time, containing two or more eras.Answer:Although usually taken to mean just a very long time, astronomy and geology use eon to mean a billion years.
Supereon is the longest classification of time in geology. The Precambrian period is a supereon comprised of the Hadean, Archean, and Proterazoic eons.
The longest subdivision of geologic time is called an super eon. Super eons make up a REALLY big chunk of time, around 2-4 billion years! There has only been 1 super eon the-Precambrian super eon. The hasn't been any new super eons due to the gap between Precambrian super eon & today-only a few hundred million years.
Canada has the longest coastline. The second longest is next to impossible to measure.
archean eon
The geologic time scale that represents the longest time span is the eon. It is a unit of time that is equal to a billion years.
An Eon.
an eon
an eon
The longest in geological time is an Eon eg. Archeozoic Eon . Edit: there is also the supereon, which is usually composed of 2-3 eons.
The longest division of geologic time, containing two or more eras.Answer:Although usually taken to mean just a very long time, astronomy and geology use eon to mean a billion years.
An eon. There 5 eons of time.
Supereon is the longest classification of time in geology. The Precambrian period is a supereon comprised of the Hadean, Archean, and Proterazoic eons.
There are two: EON which is the first, and then the second EONA.
Eon, Era, and Epoch: APEX :D
eon>era>period
Africas second longest river is the congo.