Choose one of the periods or epochs of the geologic time scale and describe it. Be sure to include its numeric age, any major fossil groups that lived then and any major geological events that took place at that time. Feel free to include anything else that you might discover such as climate, oxygen levels or extinctions.
Alternatively, you can choose a landform near to you, one that you've visited or one that you find interesting. Describe that landform including its location, type, elevation and the age of the rock. Compare the age of the landform to the ages of the rocks adjacent to or surrounding it.