GEOLOGICAL TIME SCALE

ERA	SUB-ERA / PERIOD / SUB-PERIOD / EPOCH				AGE (Ma BP)
CAINOZOIC	QUARTERNARY		HOLOCENE
			PLEISTOCENE		0.01
	TERTIARY	NEOGENE	PLIOCENE		1.64
			MIOCENE	LATE	5.2
				EARLY	14.2
		PALAEOCENE	OLIGOCENE		23.3
			EOCENE		35.4
			PALAEOCENE		56.5
MESOZOIC	CRETACEOUS		LATE		65
			EARLY		97
	JURASSIC		LATE		145.6
			MIDDLE		157.1
			EARLY		178
	TRIASSIC				208
PALAEOZOIC	PERMIAN				245
	CARBONFEROUS				290
	DEVORIAN				362.5
	SILURIAN				408.5
	ORDOVICIAN				439
	CAMBRIAN				510
PRECAMBRIAN					570