Cenozoic
Cenozoic
the shortest geologic time interval is a period.
A period.
These 3 things usually happen to signal a change from one geologic time interval to another...rocks changeclimate changesdisappearances or appearances of life
No all the dinosaurs were dead by the time of the mammoth.
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.
Eon, epoch, period, era
the Jurassic Period
This period is called holocene.
Cenozoic
The geologic time scale.
Geologic column is an ordered arrangement of rock layers that is based on the relative age of the rocks. Geologic time is the time IN the geologic column.
a geologic time scale has eras, made up of periods, epochs, etc. hope this helps! :D