i1
|
in era; period [geochronology; stratigraphy] ↞ cbx more than billions years |
i1X
|
geological eras |
i1XX
|
geological periods; stratigraphical systems |
i1XXX
|
geological epochs; stratigraphical series |
i1XXXX
|
geological ages; stratigraphical stages |
i1bWn
|
Precambrian; >540 Ma |
i1d
|
Hadean; 4550-4000 Ma |
i1hWk
|
Archean; 4000-2500 Ma |
i1h
|
Eoarchean; 4000-3600 Ma |
i1i
|
Paleoarchean; 3600-3200 Ma |
i1j
|
Mesoarchean; 3200-2800 Ma |
i1k
|
Neoarchean; 2800-2500 Ma |
i1ɭWn
|
Proterozoic; 2500-540 Ma |
i1ɭ
|
Paleoproterozoic; 2500-1600 Ma |
i1m
|
Mesoproterozoic; 1600-1000 Ma |
i1mc
|
Calymmian; 1600-1400 Ma |
i1mk
|
Ectasian; 1400-1200 Ma |
i1ms
|
Stenian; 1200-1000 Ma |
i1n
|
Neoproterozoic; 1000-540 Ma |
i1nn
|
Tonian; 1000-720 Ma |
i1nr
|
Cryogenian; 720-635 Ma |
i1nv
|
Ediacaran; 635-540 Ma |
i1pWy
|
Phanerozoic; 542-0 Ma |
i1p
|
Palaeozoic; 542-251 Ma |
i1pc
|
Cambrian; 542-488 Ma |
i1pd
|
Ordovician; 488-443 Ma |
i1pi
|
Silurian; 443-416 Ma |
i1pn
|
Devonian; 416-359 Ma |
i1po
|
Carboniferous; 359-299 Ma |
i1pp
|
Permian; 299-251 Ma |
i1s
|
Mesozoic; 250-65 Ma |
i1sd
|
Triassic; 250-210 Ma |
i1sj
|
Jurassic; 210-140 Ma |
i1sr
|
Cretaceous; 140-65 Ma |
i1t
|
Tertiary; 65-1.7 Ma |
i1tbWɭ
|
Paleogene; Palaeogene; Lower Tertiary; 65-23 Ma |
i1tb
|
Paleocene; Palaeocene; 65-56 Ma |
i1te
|
Eocene; 56-33 Ma |
i1tɭ
|
Oligocene; 33-23 Ma |
i1tmWp
|
Neogene; 23-2.5 Ma |
i1tm
|
Miocene; 23-5.3 Ma |
i1tmg
|
Aquitanian; 23.0-20.4 Ma |
i1tmi
|
Burdigalian; 20.4-15.9 Ma |
i1tmɭ
|
Langhian; 15.9-13.8 |
i1tms
|
Serravallian; 13.8-11.6 |
i1tmt
|
Tortonian; 11.6-7.2 Ma |
i1tmw
|
Messinian; 7.2-5.3 Ma |
i1tp
|
Pliocene; 5.3-2.5 Ma |
i1tpn
|
Zanclean; 5.3-3.6 Ma |
i1tpp
|
Piacenzian; 3.6-2.5 Ma |
i1u
|
Quaternary; 1.7-0.01 Ma |
i1ue
|
Pleistocene; 2.5-0.01 Ma |
i1ueg
|
Gelasian; 2.5-1.8 Ma |
i1ueɭ
|
Calabrian; 1.8-0.78 Ma |
i1uen
|
Ionian; 0.78-0.12 Ma |
i1uet
|
Tarantian; 0.12-0.01 |
i1uh
|
Holocene; 0.01-0 Ma |
Connected classes: |
18 [i1]
|
in age; geological era |
i91 [i1]
|
formed in era |
j13 [i1]
|
formed in era |
m91 [i1]
|
lived in; existed in era [palaeontology] |
n13 [i1]
|
appeared; originated in period |
n134 [i1]
|
extincted in period |
n181 [i1]
|
in era |
w1
|
in historical period; calendar time; epoch ↞ i1uh bbxprsvxw |