Overall objectives of the Subcommission on Cretaceous Stratigraphy (SCS) and fit within IUGS science policy are:

  • to establish a standard global stratigraphic subdivision and nomenclature for the Cretaceous, as part of the ICS standard global stratigraphic scale;
  • to produce a stratigraphic table displaying agreed subdivision to stage and substage level marking boundaries that are defined by a GSSP.
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