| Fortunian | ||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 Delegates from the Ichnia 2012 conference inspect the Global Boundary Stratotype Section and Point (GSSP) for the Ediacaran-Cambrian boundary at Fortune Head Ecological Reserve, Newfoundland, Canada. | ||||||||||||||||||||||||||||||||||||||
| Chronology | ||||||||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||||||||
| Etymology | ||||||||||||||||||||||||||||||||||||||
| Name formality | Formal | |||||||||||||||||||||||||||||||||||||
| Name ratified | 2007[2] | |||||||||||||||||||||||||||||||||||||
| Former name(s) | Cambrian Stage 1 | |||||||||||||||||||||||||||||||||||||
| Usage information | ||||||||||||||||||||||||||||||||||||||
| Celestial body | Earth | |||||||||||||||||||||||||||||||||||||
| Regional usage | Global (ICS) | |||||||||||||||||||||||||||||||||||||
| Time scale(s) used | ICS Time Scale | |||||||||||||||||||||||||||||||||||||
| Definition | ||||||||||||||||||||||||||||||||||||||
| Chronological unit | Age | |||||||||||||||||||||||||||||||||||||
| Stratigraphic unit | Stage | |||||||||||||||||||||||||||||||||||||
| First proposed by | Ed Landing, 2007[3] | |||||||||||||||||||||||||||||||||||||
| Time span formality | Formal | |||||||||||||||||||||||||||||||||||||
| Lower boundary definition | Appearance of the Ichnofossil Treptichnus pedum | |||||||||||||||||||||||||||||||||||||
| Lower boundary GSSP | Fortune Head section, Newfoundland, Canada 47°04′34″N 55°49′52″W / 47.0762°N 55.8310°W | |||||||||||||||||||||||||||||||||||||
| Lower GSSP ratified | 2007 (as base of Terreneuvian and Fortunian)[4] | |||||||||||||||||||||||||||||||||||||
| Upper boundary definition | Not formally defined | |||||||||||||||||||||||||||||||||||||
| Upper boundary definition candidates | First appearance of small shelly fauna or Archaeocyathids | |||||||||||||||||||||||||||||||||||||
| Upper boundary GSSP candidate section(s) | None | |||||||||||||||||||||||||||||||||||||
47°04′34″N 55°49′52″W / 47.0762°N 55.8310°W The Fortunian age marks the beginning of the Phanerozoic Eon, the Paleozoic Era, and the Cambrian Period. It is the first of the two stages of the Terreneuvian series. Its base is defined as the first appearance of the trace fossil Treptichnus pedum 538.8 million years ago. The top of the Fortunian which is the base of the Stage 2 of the Cambrian has not been formally defined yet, but will correspond to the appearance of an Archeocyatha species or "Small shelly fossils" approximately 529 million years ago.[5]
The name Fortunian is derived from the town of Fortune on the Burin Peninsula, near the GSSP and Fortune Bay.[6]
- ^ "Chart/Time Scale". stratigraphy.org. International Commission on Stratigraphy.
- ^ "GSSPs - The Cambrian System 2019". International Commission on Stratigraphy. Archived from the original on 2023-07-21.
- ^ Ed Landing, Shanchi Peng, Loren E. Babcock, Gerd Geyer, Malgorzata Moczydlowska-Vidal. "Global standard names for the Lowermost Cambrian Series and Stage" (PDF). Episodes. 30 (4): 287—289. Archived (PDF) from the original on 2015-07-25.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ "GSSP Table - Paleozoic Era". Archived from the original on 2023-10-08. Retrieved 2024-03-19.
- ^ "Global Boundary Stratotype Section and Point". International Commission of Stratigraphy. Archived from the original on 15 November 2012. Retrieved 2 November 2012.
- ^ Landing, E. "THE BASE OF THE CAMBRIAN: TERRENEUVIAN SERIES AND FORTUNIAN STAGE" (PDF). Archived (PDF) from the original on 2022-08-15.