early Early Arikareean subage - early Late Arikareean subage

International Chronostratigraphic TimescaleNorth American Mammal Subages/Zones
QuaternaryPleistoceneLate PleistoceneSheridanian0.0117
Chibanian0.129
Cudahyan/Sappan0.21
Calabrian0.774
Senecan/Rexroadian1.4
Gelasian1.8
NeogenePliocenePiacenzian2.58
Zanclean3.6
Late Hemphillian/late Early Hemphillian/early Early Hemphillian4.7
MioceneMessinian5.333
Tortonian7.246
Late Clarendonian/Early Clarendonian9.4
Serravallian11.63
late Late Barstovian/early Late Barstovian/Early Barstovian12.5
Langhian13.82
Burdigalian15.98
Late Hemingfordian/Early Hemingfordian16.3
late Late Arikareean/early Late Arikareean/late Early Arikareean/early Early ArikareeanHarrisonian18.5
Aquitanian20.45
PaleogeneOligoceneChattian23.04
Monroecreekian23.1 *
Geringian24.7 *
Rupelian27.3
29.5
EocenePriabonianLate Chadronian/Middle Chadronian/Early Chadronian33.9
37
Bartonian37.71
Late Uintan/Early Uintan39.7
Lutetian41.03
Twinbuttean/Blacksforkian/Gardnerbuttian45.9
Ypresian48.07
Lostcabinian/Lysitean/Graybullian/Sandcouleean51.1
PaleoceneThanetianCf3/Cf2/Cf156
Ti6/Ti5/Ti4/Ti3/Ti2/Ti157.5
Selandian59.24
To3/To2/To160.9
Danian61.66
Pu3/Pu2/Pu163.4
66