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Geologic Map of TexasPrecambrian
Paleozoic
( more than 600 million years ago )
( 600 to 240 million years ago )
Pennsylvanian
Permian
Mesozoic( 240 to 65 million years ago )
Jurassic, Triassic
Cretaceous (Gulf)Cretaceous (Comanche)
Cenozoic( beginning 65 million years ago )
Eocene
QuaternaryIgneous
Pliocene, Miocene,Oligocene
© Texas Almanac