Geological Time Scale

Eon	Era	Period		Epoch
Phanerozoic	Cenozoic	Quaternary		Holocene
		Quaternary		Pleistocene
		Tertiary	Neogene	Pliocene
			Neogene	Miocene
			Paleogene	Oligocene
				Eocene
				Paleocene
	Mesozoic	Cretaceous	End of Mesozoic 65 m.y.
		Jurassic
		Triassic
	Paleozoic	Permian	End of Paleozoic 245 m.y.
		Carboniferous	Pennsylvanian
		Carboniferous	Mississippian
		Devonian
		Silurian
		Ordovician
		Cambrian
Proterozoic	Precambrian (87% of geologic time scale)	End of Precambrian 543 m.y.
Archean
Hadean

Quiet Time Can Just Tease People Particularly Men Dodging Spouses Ordering Chores
Quit Telling Crummy Jokes To People Playing Monopoly During School Or Card Playing
Can Only Silly Dumb Men Play Poker 'Til Just Cents Pile Neatly
Cold Oysters Seldom Develop Many Pearls, Their Juices Congeal To Quickly
Crazy Jack Tried Putting Purple Marbles Down Some Old Cows Ears
Quit Telling Crazy Jack That Peter Paul Mary Died Slowly Over Coals
Quit Telling Crazy Jack That Perry Como Died Slowly Over Coals
Can Old Senators Demand More Political Power Than Junior congressmen? Tough Question
Quick Tom Clean Just 'Til Peter Comes Down Stairs On Clouds
Could Oscar Sprint Down Mary Poppins Path To Just Cary The Quail

Timescale modified after Dr. Pamela Gore, Dekalb College, Georgia.

Rhymes obtained from web site of Dr. Robert Jorstad, Eastern Illinois University.