geologic time scale
The information the geologic scale provides is animals and fossils over time and periods. Major divisions of time is called eras.
On the geologic time scale, an era is longer than a period. There are 12 geologic eras in total and they are composed of geologic periods. For instance, the Mesozoic era is composed of the Triassic, Jurassic and Cretaceous periods.
Usually, they represent periods between extinction events, where a particular type of lifeform was dominant.
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.
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geologic time scale
The basic units of the geologic time scale eras and periods.
By eons, eras, epochs, and periods.
eras and periods
fossil record geologic time scale
geologic time scale
The Paleozoic, the Mesozoic and the Cenozoic are all divided into periods and epochs.
A geologic time scale is a scale that was developed by scientists to show when and for how long different events happened in the Earth's history. Some events included on the scale are when plant life appeared, when mountains were formed and when dinosaurs roamed the Earth. The geologic time scale divides Earth's history into periods such as the Cretaceous, Jurassic and Triassic periods.
The information the geologic scale provides is animals and fossils over time and periods. Major divisions of time is called eras.
fossil record geologic time scale
fossil record geologic time scale