Niagara Falls - Rock of Ages Chart

GEOLOGIC TIME SCALE
*EONS*	*ERA*	*PERIOD*	*LITHIC TYPES*	YEARS (millions)
ORIGIN of the EARTH 4,500 million years ago
Cryptozoic Eon - 3,900 million years duration
Cryptozoic Eon 4,470 million years ago	Archaean Era - 2,000 million years duration
Cryptozoic Eon	Archaean Era		Oldest rocks in USA - 3,600 million years ago
Cryptozoic Eon	Proterozoic Era - 1,930 million years duration
Cryptozoic Eon 2,500 million years ago	Proterozoic Era	Aphebian - 900 million years
Cryptozoic Eon 1,600 million years ago	Proterozoic Era	Helikian - 800 million years
Cryptozoic Eon 800 million years ago	Proterozoic Era	Hadrynian - 230 million years
Phanerozoic Eon - 570 million years duration
Phanerozoic Eon	Paleozoic - 330 million years duration
Phanerozoic Eon 570 million years ago	Paleozoic Era	Cambrian - 70 million years
Phanerozoic Eon	Paleozoic Era	Cambrian	Croixian
Phanerozoic Eon	Paleozoic Era	Cambrian	Alberton
Phanerozoic Eon	Paleozoic Era	Cambrian	Taconian
Phanerozoic Eon 500 million years ago	Paleozoic Era	Ordovician - 65 million years
Phanerozoic Eon	Paleozoic Era	Ordovician	Cincinnatian
Phanerozoic Eon	Paleozoic Era	Ordovician	Mohawkan
Phanerozoic Eon	Paleozoic Era	Ordovician	Champlainian
Phanerozoic Eon	Paleozoic Era	Ordovician	Canadian
Phanerozoic Eon 435 million years ago	Paleozoic Era	Silurian - 25 million years
Phanerozoic Eon	Paleozoic Era	Silurian	Cayugan
Phanerozoic Eon	Paleozoic Era	Silurian	Niagaran (rocks exposed in Niagara Gorge)
Phanerozoic Eon 410 million years ago	Paleozoic Era	Devonion - 50 million years
Phanerozoic Eon	Paleozoic Era	Devonion	Chautauguan
Phanerozoic Eon	Paleozoic Era	Devonion	Senecan
Phanerozoic Eon	Paleozoic Era	Devonion	Erian
Phanerozoic Eon	Paleozoic Era	Devonion	Ulsterian
Phanerozoic Eon 360 million years ago	Paleozoic Era	Mississippian - 30 million years
Phanerozoic Eon 330 million years ago	Paleozoic Era	Pennsylvanian - 40 million years
Phanerozoic Eon 290 million years ago	Paleozoic Era	Permian - 50 million years
Phanerozoic Eon	Paleozoic Era	Pennsylvanian	Alliganian Orogeny
Phanerozoic Eon 240 million years ago	Mesozoic - 177 million years duration
Phanerozoic Eon	Mesozoic Era	Triassic - 35 million years
Phanerozoic Eon	Mesozoic Era	Triassic	Palsadian Taphrogeny
Phanerozoic Eon 205 million years ago	Mesozoic Era	Jurassic - 67 million years
Phanerozoic Eon	Mesozoic Era	Cretaceous - 75 million years
Phanerozoic Eon 63 million years ago	Cenozoic - 63 million years duration
Phanerozoic Eon	Cenozoic Era	Tertiary - 61 million years
Phanerozoic Eon 2 million years ago	Cenozoic Era	Quaternary - 2 million years

NIAGARA FALLS THUNDER ALLEY NAVIGATOR
INFORMATION INDEX	HISTORICAL ARCHIVE	PICTURES & SLIDESHOWS
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