Working Groups

Click on the ages or the extra Working Group regions on the right in the timeline below to go to the various Working Groups or GSSP pages.

Cretaceous
Late
Early
Maastrichtian
66.04
Campanian
72.17
Santonian
83.65
Coniacian
85.7
Turonian
89.39
Cenomanian
93.9
Albian
100.5
Aptian
113.2
Barremian
121.4
Hauterivian
126.5
Valanginian
132.6
Berriasian
137.7
143.1
WG
Kilian Group