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
66.0
Campanian
72.1
Santonian
83.6
Coniacian
86.3
Turonian
89.8
Cenomanian
93.9
Albian
100
Aptian
113
Barremian
126
Hauterivian
131
Valanginian
134
Berriasian
139
145