cenizoic
hadean
paleothenic
heliothenic
Geological eras can be divided into periods, epochs and ages.
Eras divide into periods and periods divide into epochs. The Palaeozoic Era is composed of the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian periods (in that order). The Mesozoic Era is divided into the Triassic, Jurassic and Cretaceous periods. The Cenozoic Era is divided into the Tertiary and Quaternary periods. The Tertiary period is divided into the Palaeocene, Eocene, Oligocene, Miocene and Pliocene epochs while the Quaternary period is divided into the Pleistocene and Holocene epochs. Note that eras are not the longest lengths of time. Eras may compose longer stretches of time known as eons/aeons.
Eras are great lengths of time but periods are the small amounts of time in eras.
Eons, eras, periods, and epochs are hierarchical divisions of geological time used to organize Earth's history. Eons are the largest time frames, subdivided into eras, which are further divided into periods, and then into epochs. This system allows scientists to categorize significant events in Earth's history, such as major geological and biological changes. Each division reflects varying lengths of time, with eons encompassing billions of years and epochs spanning millions of years.
Eras in the geologic time scale are divided into periods. Each period represents significant intervals of geological time characterized by distinct geological and biological events. Further subdivisions of periods are known as epochs, and these can be further divided into ages.
eras and periods
periods make up eras
Geological eras can be divided into periods, epochs and ages.
Geological eras can be divided into periods, epochs and ages.
Eons are divided into eras, which are further divided into periods. Each period is then subdivided into epochs.
Periods mean eras centuries ages
The Geological eras can be divided into three major eras: Paleozoic, Mesozoic, and Cenozoic. These eras represent different periods in the Earth's history marked by significant geological and biological changes. Each era is further subdivided into periods, epochs, and ages.
By eons, eras, epochs, and periods.
An eon is an indefinitely long period of time, in which there exist noteworthy periods known as eras.
By eons, eras, epochs, and periods.
farts
Eras are based one the worldwide changes in types of fossils. Periods are based on types of life worldwide. The Cenozoic era is the geological time scale is divided into both periods and epoch.