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, maps, and more from National Geographic. Humans have walked the Earth for 190,000 years, a mere blip in Earth's 4.5-billion-year history.

What Was Happening on Earth at This Time The Precambrian is the earliest of the geologic ages, which are marked by different layers of sedimentary rock. Laid down over millions of years ...

Figure 1: Comparison of the current Geologic Time Scale 10 (GTS2012), with two alternatives. We therefore review human geology in four parts. First, we summarize the geologically important human ...

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 ... to sort events in the order they have happened. Show the geologic ...