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, ...

The geological time scale, established by scientists in the mid-19th century and agreed upon internationally, breaks down the eternity of our planet's history into more manageable units than years.

In 1913, before he even earned his doctoral degree, he proposed the first geological time scale, based on the fairly ... up remarkably well over time: For example, he placed the beginning of ...