Sakmarian

Sakmarian
293.52 ± 0.17 – 290.1 ± 0.26 Ma
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Chronology
Etymology
Name formalityFormal
Usage information
Celestial bodyEarth
Regional usageGlobal (ICS)
Time scale(s) usedICS Time Scale
Definition
Chronological unitAge
Stratigraphic unitStage
Time span formalityFormal
Lower boundary definitionFAD of the Conodont Mesogondolella monstra
Lower boundary GSSPUsolka section, Southern Ural Mountains, Russia
53°55′29″N 56°43′43″E / 53.9247°N 56.7287°E / 53.9247; 56.7287
Lower GSSP ratified2018[2]
Upper boundary definitionFAD of the Conodont Sweetognathus whitei
Upper boundary GSSPDalny Tulkas section, Southern Ural Mountains, Russia
53°55′29″N 56°30′58″E / 53.9247°N 56.51615°E / 53.9247; 56.51615
Upper GSSP ratifiedFebruary 2022[3]

In the geologic timescale, the Sakmarian is an age or stage of the Permian period. It is a subdivision of the Cisuralian Epoch or Series. The Sakmarian lasted between 293.52 and 290.1 million years ago (Ma). It was preceded by the Asselian and followed by the Artinskian.[4]

  1. ^ "International Chronostratigraphic Chart" (PDF). International Commission on Stratigraphy. September 2023. Retrieved November 10, 2024.
  2. ^ Shen, Shuzhong (August 2018). "Notes from the SPS Chair" (PDF). Permophile: 4. ISSN 1684-5927. Retrieved 12 December 2020.
  3. ^ "Ratification of Artinskian GSSP". International Commission on Stratigraphy. Retrieved 23 March 2022.
  4. ^ Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press