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, photos, facts ... The productive Paleozoic era gave rise to hard-shelled organisms, vertebrates, amphibians, and reptiles. Dinosaurs ruled the Earth ...

The geological time scale, established by scientists in the ... The scale functions as a massive calendar, dividing the history of life into eras, periods, and epochs based on fossil evidence.

According to the International Union of Geological Sciences (IUGS), the professional organization in charge of defining Earth’s time scale ... The atomic era, for instance, has left traces ...

I like to use a meter stick and be very intentional with my spacing to model time as a scale. I also avoid using the far right ... of the Earth that is characteristic of a particular span of geologic ...