Boring Billion
Paleoproterozoic
Precambrian period
Precambrian
Precambrian aeon
Precambrian eon
Ectasian
Varangian
synodic period
Stenian
Hadean
Kenorland
hylaeosaurus
Atlantica
Phanerozoic
nummulite
Pannotia
Triassic period
Triassic
Calymmian
Jurassic
Jurassic period
Devonian
Tonian
Neoproterozoic
Cryogenian
genus Argentinosaurus
day
Permian-Triassic extinction
year
solar year
astronomical year
sporozoite
equinoctial year
tropical year
anomalistic year
Stennian
Pleistocene
Archaean
Mesoproterozoic
Paleozoic
paleozoologic
circle
Acadian
RTLT
Quaternary period
Glacial epoch
Age of Man
Pleistocene epoch
metaestrous
neoglaciation
Mesozoic
Quaternary
round-trip light time
Triassic-Jurassic extinction event
Archeozoic
Archeozoic eon
ice age
Archaeozoic
glacial epoch
Archean
Archaeozoic aeon
Archean eon
apparition
Archean aeon
glacial period
cosmic time
Orosirian
paleoproteome
biochron
decamillennium
Mississippian
Furongian
Lower Carboniferous period
apobaryon
globulus
mesocenozoic
proto-Earth
Lower Carboniferous
submillennial
-cene
subrecent
Missippian period
infalling
Turonian
Phanerozoic eon
geologic time
Phanerozoic aeon
Hettangian
Cenozoic
geological time
Cambrian
pralaya