Starting with the Precambrian Era. 4600 million to 570million years ago.
Paleozoic Era. 570 million to 245 million years ago.
Mesozoic Era. 245 million to 66 million years ago.
Cenozoic era: 66 million years to Today.
Precambrian, Paleozoic, Mesozoic, and Cenozoic.
geological; cosmological; calendar; regnal [per Wikipedia.org]
precambrian, palezoic, mesozoic, cenozoic
Periods are subdivided into periods of time know as epochs.
Four eons comprise Earth's geological time scale. Other time intervals of the Earth are eras, periods, and epochs.
NOPE
noon.
Information on time periods in earth's history and the events that happened in those time periods, all based on the study of fossils and rock layers.
The 4 time periods are listed in order, Mycenaean, Dark Age, Age of Expansion, and Golden Age.
The Stone Age can be divided into three main time periods: the Paleolithic (Old Stone Age), the Mesolithic (Middle Stone Age), and the Neolithic (New Stone Age). Each period is characterized by different technological developments and changes in human behavior.
jsloeir
4
2+2=4
well if I understood your question right, look at football for example 15:00 minute quarters [1/4], there are 4 quarters and that means a total playing time of 1 hour (or 1 whole [4/4])
Periods are subdivided into periods of time know as epochs.
The time periods are called quarters and there are four of them.
Geologic time consists of eons, eras, periods, epochs, and ages. These measure periods of billions or millions of years.
The periods are... 1. Cambrian 2. Ordovician 3. Silurian 4. Devonian 5. Carboniferous 6. Permian -You owe me big time!
Interim Periods
they dont have periods.