ARCHIVED REPORTS_1995 - Laserfiche WebLink

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ran Period Estimated Estimated Era or I EAodr Rock Series D"ma. Yews S'am Radr System Years Reyamary Quaternary I Recant Epoch (Recent 10 to 25.000 Pleistocene Pleistocene 1 million 1 million e � Tertiary Pliocene Pliocene 12 million 13 million M Miocene Miocene 12 million 25 million 0 V Oligocene Oligocene 11 million 36 million Eocene Eocene 22 million 58 million Paleocene Paleocene 5 million 63 million Cretaceous Late Cretaceous Upper Cretaceous ' 62 million Early Cretaceous Lower Cretaceous 135 million w Jurassic Late Jurassic Upper Jurassic 46 million Early Jurassic Lower Jurassic 181 million Triassic Late Triassic Upper Triassic Early Triassic Lower Triassic 49 million230 million Permian Late Permian Upper Permian r 50 million Early Permian Lower Permian 280 million `Pennsylvanian Late Pennsylvanian Upper Pennsylvanian Middle Pennsylvanian Middle Pennsylvanian 65 Early Pennsylvanian Lower Pennsylvanian million ®Mississippian Late Mississippian Upper Mississippian Early Mississippian Lower Mississippian 345 million m Devonian Late Devonian Upper Devonian w 60 v Middle Devonian Middle Devonian .. o million c Early Devonian Lower Devonian 405 million m ri Silurian Late Silurian Upper Silurian 20 Middle Silurian Middle Silurian Early Silurian Lower Silurian million425 million Ordovician Late Ordovician Upper Ordovician 75 Middle Ordovician Middle Ordovician million Early Ordovician Lower Ordovician 500 million Cambrian Late Cambrian Upper Cambrian 100 Middle Cambrian Middle Cambrian million Early Cambrian Lower Cambrian 600 million Precambrian I Informal subdivisions used locally Over 3 billion "Considered subdivisions of the Carboniferous Rock System J. H. KLEINFELDER & ASSOCIATES GEOLOGIC TIME SCALE CEOTE'CHNICAL CONSULTANTS — MATERIALS TESTING PREPARED BY: SRD DATE: 12-10-81 CHECKED BY: OATEi PROJECT NO. S-1008-35 PLATE NO. TT