-
Period: to
Geologic Time
(year = #Eon, #Era, #Period, #Epoch), except for Precambrian dates which are placed in the year 2000 in order to save the immense space which the Precambrian took up. -
9/10 of Earth's history
Precambrian INORGANIC -
Only simple marine life
Precambrian - Archean/Proterozoic Eons ORGANIC -
Volcanic activity in S.E. Mo.
Precambrian - ~Proterozoic Eon INORGANIC -
Trilobites abundant
Phanerozoic Eon - Paleozoic Era - Cambrian Period ORGANIC -
Humans Ozarks uplifted
Phanerozoic Eon - Paleozoic Era - Cambrian Period(?) INORGANIC -
Missouri covered by seas
Phanerozoic Eon - Paleozoic Era - Cambrian Period INORGANIC -
First abundant fish
Phanerozoic Eon - Paleozoic Era - Ordovician Period ORGANIC -
First forests
Phanerozoic Eon - Paleozoic Era - Devonian Period ORGANIC -
Coal deposits form
Phanerozoic Eon - Paleozoic Era - Mississippian Period INORGANIC -
Appalachian Mtns. form
Phanerozoic Eon - Paleozoic Era - Pennsylvanian Period INORGANIC -
Age of Reptiles
Phanerozoic Eon - Paleozoic Era - Pennsylvanian Period ORGANIC -
Last major uplift of Ozarks
Phanerozoic Eon - Paleozoic Era - Pennsylvanian Period INORGANIC -
Crinoids abundant in Mo.
Phanerozoic Eon - Paleozoic Era - Pennsylvanian Period ORGANIC -
Steep bluffs form along rivers (Mo.)
Phanerozoic Eon - Paleozoic Era - Pennsylvanian Period INORGANIC -
Pangea forms
Phanerozoic Eon - Paleozoic Era - Permian Period INORGANIC -
Age of Dinosaurs
Phanerozoic Eon - Mesozoic Era - Triassic Period ORGANIC -
Pangaea breaks up
Phanerozoic Eon - Mesozoic Era - Triassic Period INORGANIC -
Ancient Birds
Phanerozoic Eon - Mesozoic Era - Jurassic Period ORGANIC -
Rocky Mtns. form
Phanerozoic Eon - Mesozoic Era - Cretaceous Period INORGANIC -
Age of Mammals/Birds
Phanerozoic Eon - Cenozoic Era - Tertiary Period ORGANIC -
Himalaya Mtns. form
Phanerozoic Eon - Cenozoic Era - Tertiary Period - Oligocene Epoch INORGANIC -
Superlarge mammals
Phanerozoic Eon - Cenozoic Era - Tertiary Period - Pliocene Epoch ORGANIC -
Most recent Ice Ages
Phanerozoic Eon - Cenozoic Era - Quaternary Period - Pleistocene Epoch INORGANIC -
Ozarks eroded & covered repeatedly
Phanerozoic Eon - Cenozoic Era - Quaternary Period - Holocene Epoch INORGANIC
