|Geological Time 2013 (on Blue)|
In geology, layers of rock are identified and dated by whats in them (finds of fossils or minerals) These layers of time are given names e.g. Jurassic, Devonian etc and they span from today all the way back billions of years.
(before that is called the Pre-Cambrian and divided into the Proterozoic and Archean)
Their is a a way to remember all those names and it might be something you recall from school. Here it goes: Camels Often Sit Down Carefully Perhaps Their Joints Creak (Perhaps Effective Oiling Might Prolong Perfect Health)
|Geological Time (On White)|