We will provide a list of web sites with relevant information. The geologic time scale is divided into eons, eras, periods, epochs, and ages. Our activities, and the time scale for download above, ...

Prehistoric time line, geologic time scale ... The productive Paleozoic era gave rise to hard-shelled organisms, vertebrates, amphibians, and reptiles. Dinosaurs ruled the Earth in the mighty ...

Time is fundamental to Earth science. Geochronology data are essential for determining the timing, duration, and rates of Earth processes and events, and are increasingly required to perform modern, ...

Some argue yes, and this new era has been dubbed the ... will be washed away in the waves of time. In March 2024, the International Union of Geological Sciences (IUGS) aroused controversy when ...

Ages, epochs, periods, and even eras ... also note that this particular rock layer lies directly on the boundary where the Messinian transitions into the Zanclean, which is around the time of ...

An Index fossil is any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment ... Then mark the end of each Era. Color ...