English geology mnemonics
Stalagmites come from the ground, while stalactites come from the ceiling.
The middle periods are Precambrian, Cambrian, Ordovician, Silurian, Devonian, Carboniferous, Permian, Triassic, Jurassic, Cretaceous:
- Pregnant Camels Ordinarily Sit Down Carefully. Perhaps Their Joints Creak
The Cenozoic periods are Paleocene, Eocene, Oligocene, Miocene, Pliocene, Pleistocene, Holocene:
- Possibly Early Oiling Might Prevent Poor Health
- Put Everything On My Pants Please Hannah
- Put Eggs On My Plate Please Honey.
Moh's scale of hardness:
Talc, Gypsum, Calcite, Fluorite, Apatite, Felspar, Quartz, Topaz, Corundum, Diamond.
An easy way to remember the names of these minerals in their order of hardness is: Two German Colonels Fired A French Queen To Cause Death.