Blackhillsian age

475.3 - 471.3 Ma

The definition of this interval in the timescale Ordovician of North America is taken from the following source:

  • F. M. Gradstein, J. G. Ogg, M. D. Schmitz and G. M. Ogg. 2020. Geologic Time Scale 2020 view

The bottom age has been interpolated based on the differences between the ages for international timescale boundaries quoted in the source and the currently accepted ages for those boundaries.

There are intervals in 7 timescales which overlap this one. show

This interval is used in the definition of 309 collections

A total of 650 collections with 3109 occurrences lie within this time span

Show less time

Show linear time

International Chronostratigraphic TimescaleOrdovician of North America
QuaternaryHoloceneMeghalayan0
Northgrippian0.0042
Greenlandian0.0082
PleistoceneLate Pleistocene0.0117
Chibanian0.129
Calabrian0.774
Gelasian1.8
NeogenePliocenePiacenzian2.58
Zanclean3.6
MioceneMessinian5.333
Tortonian7.246
Serravallian11.63
Langhian13.82
Burdigalian15.98
Aquitanian20.45
PaleogeneOligoceneChattian23.04
Rupelian27.3
EocenePriabonian33.9
Bartonian37.71
Lutetian41.03
Ypresian48.07
PaleoceneThanetian56
Selandian59.24
Danian61.66
CretaceousLate CretaceousMaastrichtian66
Campanian72.2
Santonian83.6
Coniacian85.7
Turonian89.8
Cenomanian93.9
Early CretaceousAlbian100.5
Aptian113.2
Barremian121.4
Hauterivian125.77
Valanginian132.6
Berriasian137.05
JurassicLate JurassicTithonian143.1
Kimmeridgian149.2
Oxfordian154.8
Middle JurassicCallovian161.5
Bathonian165.3
Bajocian168.2
Aalenian170.9
Early JurassicToarcian174.7
Pliensbachian184.2
Sinemurian192.9
Hettangian199.5
TriassicLate TriassicRhaetian201.4
Norian205.7
Carnian227.3
Middle TriassicLadinian237
Anisian241.464
Early TriassicOlenekian246.7
Induan249.9
PermianLopingianChanghsingian251.902
Wuchiapingian254.14
GuadalupianCapitanian259.51
Wordian264.28
Roadian266.9
CisuralianKungurian274.4
Artinskian283.3
Sakmarian290.1
Asselian293.52
CarboniferousPennsylvanianGzhelian298.9
Kasimovian303.7
Moscovian307
Bashkirian315.2
MississippianSerpukhovian323.4
Visean330.3
Tournaisian346.7
DevonianLate DevonianFamennian358.86
Frasnian372.15
Middle DevonianGivetian382.31
Eifelian387.95
Early DevonianEmsian393.47
Pragian410.62
Lochkovian413.02
SilurianPridoli419.62
LudlowLudfordian422.7
Gorstian425
WenlockHomerian426.7
Sheinwoodian430.6
LlandoveryTelychian432.9
Aeronian438.6
Rhuddanian440.5
OrdovicianLate OrdovicianHirnantianCincinnatianGamachian443.1
Katian445.2
Richmondian445.5
MaysvillianRocklandian †/Shermanian/Ashbyan/Kirkfieldian/Blackriveran/Wildernessian/Trentonian/Franklinian449.6
Edenian450.2
MohawkianChatfieldian451
Sandbian452.8
Turinian453.8
WhiterockianCanadian †Chazyan †/Marmor457.3
Middle OrdovicianDarriwilian458.2
Dapingian469.4
Rangerian470.3
Early OrdovicianFloianIbexianBlackhillsianJeffersonian †Cassinian †471.3
Tulean475.3 *
Tremadocian477.1
Stairsian481.7 *
SkullrockianDemingian †483.4 *
CambrianFurongianStage 10486.85
488.9 *
Jiangshanian491
Paibian494.2
MiaolingianGuzhangian497
Drumian500.5
Wuliuan504.5
Series 2Stage 4506.5
Stage 3514.5
TerreneuvianStage 2521
Fortunian529
538.8