Mnemonic Device
- Older Deer Play Together Cautiously
Explanation
Represents biological time superimposed over geologic time to mark major extinction events. Specifically, at the end of the Ordovician, Devonian, Permian, Triassic and Cretaceous times.
Memory tricks for school, homework & everyday life
Represents biological time superimposed over geologic time to mark major extinction events. Specifically, at the end of the Ordovician, Devonian, Permian, Triassic and Cretaceous times.