New edition of the Chart - 2022-10

There is a new edition of the International Chronostratigraphic Chart: 2022-10:

ChronostratChart2022-10

This version of the chart has the following updates, the full details of which are given in the Changelog file on the chart page:

  • GSSPs added
    • 2022/10 - Cretaceous: Campanian Stage: GSSP added as it was ratified by IUGS (5-10-2022)
  • GSSAs changed/dropped/introduced:
    • 2022/10 - Hadean: GSSA instated as ratified by IUGS (5-10-2022). The GSSA is 4,567.30 ± 0.16 Ma.
    • The chart displays it in rounded form: 4,567 Ma. This replaces non-GSSA provisional age of ~ 4,600 Ma.
  • Numeric Ages altered:
    • 2022/10 - Jurassic: numeric ages of all stages updated to comply to GTS2020 - by request of SCJS (Angela Coe)
      • Tithonian 149.2 +/- 0.7 Ma (was: 152.1 +/- 0.9 Ma )
      • Kimmeridgian 154.8 +/- 0.8 Ma (was: 157.3 +/- 1.0 Ma )
      • Oxfordian 161.5 +/- 1.0 Ma (was: 163.5 +/- 1.0 Ma )
      • Callovian 165.3 +/-1.1 Ma (was: 166.1 +/- 1.2 Ma )
      • Bathonian 168.2 +/- 1.2 Ma (was: 168.3 +/- 1.3 Ma )
      • Bajocian 170.9 +/- 0.8 Ma (was: 170.3 +/- 1.4 Ma )
      • Aalenian 174.7 +/- 0.8 Ma (was: 174.1 +/- 1.0 Ma )
      • Toarcian 184.2 +/- 0.3 Ma (was: 182.7 +/- 0.7 Ma )
      • Pliensbachian 192.9 +/-0.3 Ma (was: 190.8 +/- 1.0 Ma )
      • Sinemurian 199.5 +/-0.3 Ma (was: 199.3 +/- 0.3 Ma )
      • Hettangian 201.4 +/- 0.2 Ma (was: 201.3 +/- 0.2 Ma )
  • Graphics
    • ICS bottom of chart signature at base Archean moved back to base Hadean (to indicate the now formalised status of the Hadean with the ratified GSSA).

Kim Cohen
ICS Graphics Officer
2022-10-11