The full list of Eras would be Eoarchean, Paleoarchean, Mesoarchaean, Neoarchaean, Paleoproterozoic, Mesoproterozoic, Neoproterozoic, Paleozoic, Mesozoic, and Cenozoic.
Everything prior to the last three are sometimes informally lumped together as "Precambrian".
eras and periods
The information the geologic scale provides is animals and fossils over time and periods. Major divisions of time is called eras.
The two basic divisions following the Precambrian on the geologic time scale are the Paleozoic Era and the Mesozoic Era. These eras are further divided into periods, such as the Cambrian, Devonian, and Permian in the Paleozoic Era, and the Triassic, Jurassic, and Cretaceous in the Mesozoic Era.
Cenozoic is not a major period of the geologic time scale. The scale is broken down into eras. Cenozoic, Mesozoic and Paleozoic are all part of the Phanerozic era.
The basic units of the geologic time scale eras and periods.
Mainly abrupt changes in mineral layers or the fossils in them.
The geologic time scale provides a timeline of Earth's history, dividing it into periods based on significant events and changes in the planet's environment. The major divisions of geological time are eons, eras, periods, epochs, and ages, each reflecting different intervals of time with distinct characteristics and geological events.
EonEraPeriodEpoch! :)
The four large sections on the geologic time scale are eons, eras, periods, and epochs. Each of these divisions represents a different scale of time with eons being the largest and epochs being the smallest.
The geologic time scale.
The largest divisions of time on the geological time scale are eons, which are the longest units of time and are further divided into eras. The current eon, the Phanerozoic Eon, is divided into three eras: Paleozoic, Mesozoic, and Cenozoic. Each era is further subdivided into periods, epochs, and ages.
Assigning dates to divisions of the geologic time scale can be difficult because different rock layers and fossils may not be found in all locations, making correlation between different areas challenging. Additionally, the accuracy of dating methods can vary depending on the type of material being dated. Lastly, changes in Earth's environment and processes over time can complicate the interpretation of the geologic record.