Tremadocian

Green Point Plate 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)

  • Locality: Green Point Section, western Newfoundland (49.6829°N, 57.9653°W)
  • Boundary level: At the 101.8m level, within Bed 23, in the measured section
  • Correlation events: Conodont FAD Iapetognathus fluctivagus
  • Status: Ratified in 2000; Episodes 24/1, p. 19 – 28, 2001.

GSSP of the base of the Tremadocian Stage

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.