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, ...

Mr. Evans thought that there would be great difficulty in estimating geological periods from the variations between the axis of figure and the axis of rotation, inasmuch as at no given time could ...

A Timescale is a scale used to represent periods of time. Option ... in the rock record of the Earth that is characteristic of a particular span of geologic time or environment. We will look at a few ...