Geologic time is a way to represent time based on the rock record of Earth.
Geologic time is a chronological dating that uses Chrono stratigraphy and Geochronology.
What is Geologic Time?
Geologic time is the extensive interval of time occupied by the geologic history of Earth.
It starts from Archean Eon and continues to present day.
The geologic time scale is the calendar for the events in earth history. It is subdivided into Eons, Eras, Periods, Epochs and Ages.
The best source to stud geologic time is the study of fossils as it helps in providing the timing of emergence and disappearance of widespread species resulting into the beginnings and endings of ages, epochs, periods and other intervals.
The standard definition of Geologic time is given by International Commission on Stratigraphy which is a body under International Union of Geological Sciences.
How Geologic Time is divided?
The Geologic Time is divided under the sub categories such as:
1. Eon- Largest Geochronological time unit and equivalent to Chronostratigraphic Eonothem.
2. Era- Second largest Geochronologic time unit and equivalent to Chronostratigraphic Erathem
3. Period- Geochronologic equivalent of a Chronostratigraphic system
4. Epoch- Equivalent of a Chronostratigraphic series.
5. Age- Smallest hierarchical Geochronologic unit and equivalent of a chronostratigraphic series.
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