Viséan
Second stage of the Carboniferous / From Wikipedia, the free encyclopedia
The Visean, Viséan or Visian is an age in the ICS geologic timescale or a stage in the stratigraphic column. It is the second stage of the Mississippian, the lower subsystem of the Carboniferous. The Visean lasted from 346.7 to 330.9 Ma.[2] It follows the Tournaisian age/stage and is followed by the Serpukhovian age/stage.
Quick Facts Chronology, Etymology ...
Viséan | |||||||||||||||
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346.7 ± 0.4 – 330.9 ± 0.2 Ma | |||||||||||||||
Chronology | |||||||||||||||
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Etymology | |||||||||||||||
Name formality | Formal | ||||||||||||||
Alternate spelling(s) | Visean, Visian | ||||||||||||||
Usage information | |||||||||||||||
Celestial body | Earth | ||||||||||||||
Regional usage | Global (ICS) | ||||||||||||||
Time scale(s) used | ICS Time Scale | ||||||||||||||
Definition | |||||||||||||||
Chronological unit | Age | ||||||||||||||
Stratigraphic unit | Stage | ||||||||||||||
Time span formality | Formal | ||||||||||||||
Lower boundary definition | FAD of the benthic foraminifer Eoparastaffella simplex | ||||||||||||||
Lower boundary GSSP | Pengchong Section, Guangxi, China 24.4333°N 109.4500°E / 24.4333; 109.4500 | ||||||||||||||
Lower GSSP ratified | 2008 | ||||||||||||||
Upper boundary definition | Not formally defined | ||||||||||||||
Upper boundary definition candidates | FAD of the conodont Lochriea ziegleri | ||||||||||||||
Upper boundary GSSP candidate section(s) |
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