Tremadocian

GSSP for the Tremadocian at Green Point. Photo courtesy to Stan Finney.

Age

  • Base: 485.4 Ma (GTS 2012), 488.3 Ma (GTS 2004)
  • Top: 477.7 Ma (GTS 2012), 478.6 Ma (GTS 2004)
  • Duration: 7.7 Ma (GTS 2012), 9.7 (GTS 2004)

Global stratotype section and point (GSSP)

GSSP of the base of the Tremadocian Stage, and Ordovician System, at Green Point, Newfoundland. People in back point to the boundary level. Photo courtesy to Stan Finney.