age_terms
Archean
Arikareean
Bridgerian
Bull Lake
Cambrian
Cambrian-Precambrian
Cambrian-Proterozoic
Carboniferous
Cenozoic
Chesterian
Cretaceous
Cretaceous-Jurassic
Cretaceous-Permian
Cretaceous-Precambrian
Cretaceous-Proterozoic
Desmoinesian
Devonian
Devonian-Cambrian
Devonian-Ordovician
Eocene
Holocene
Jurassic
Jurassic-Permian
Jurassic-Triassic
Laramide
Leonardian
Ludlow
Maastrichtian
Meramecian
Mesoproterozoic
Mesozoic
Mesozoic-Paleozoic
Mesozoic-Permian
mid-Campanian
Miocene
Mississippian
Mississippian-Cambrian
Mississippian-Devonian
Missourian
Morrowan
Neogene
Neoproterozoic
Oligocene
Ordovician
Ordovician-Cambrian
Ordovician-Proterozoic
Osagean
Paleocene
Paleoproterozoic
Paleozoic
Paleozoic-Proterozoic
Pennsylvanian
Pennsylvanian-Mississippian
Permian
Permian-Cambrian
Permian-Devonian
Permian-Devonian
Permian-Pennsylvanian
Permian-Triassic
Pinedale
Pleistocene
Pliocene
pre-Belt
pre-Beltian
pre-Bull Lake
Precambrian
pre-Flathead
pre-Kinnikinic
present
Proterozoic
Proterozoic-Archean
Proterozoic-Early
Quaternary
Quaternary-Tertiary
Recent
Silurian
Silurian-Ordovician
Tertiary
Tertiary-Cretaceous
Tertiary-Precambrian
Triassic
Triassic-Jurassic
Triassic-Permian
Wenlock
Wisconsin
Wolfcampian