Artinskium

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system series step ≈ age ( mya )
higher higher higher younger
Perm Lopingium Changhsingium 251.9
⬍
254.2
Wuchiapingium 254.2
⬍
259.9
Guadalupium Capitanium 259.9
⬍
265.1
Wordium 265.1
⬍
268.8
Roadium 268.8
⬍
272.3
Cisuralium Kungurium 272.3
⬍
279.3
Artinskium 279.3
⬍
290.1
Sacmarium 290.1
⬍
295.5
Asselium 295.5
⬍
298.9
deeper deeper deeper older
Jimbacrinus bostocki from the Artinskium (Australia)

The Artinskium is a chronostratigraphic level of the Unterperm or the Cisuralium in the history of the earth . The level ranges in absolute numbers ( geochronologically ) from about 290.1 ​​million years to about 279.3 million years. The Artinskium follows the Sakmarium and is replaced by the Kungurium .

Naming and history

The Artinskium is named after the place Arti (formerly Artinsk , Artinski Sawod ) in the western part of the Ural Mountains ( Russia ). The level and name were suggested by Alexander Karpinski in 1884.

Definition and GSSP

The beginning of the Artinskium is defined by the first appearance of the conodont species Sweetognathus whitei and Mesogondolella bissell . The end of the stage is reached with the first appearance of the conodont species Neostreptognathus pnevi and Neostreptograthus exculptus . A GSSP (globally valid type locality and type profile) has not yet been ratified.

literature

  • Felix Gradstein, Jim Ogg, Jim & Alan Smith: A Geologic timescale. Cambridge University Press 2004, ISBN 9780521786737
  • Hans Murawski & Wilhelm Meyer: Geological dictionary . 10., rework. u. exp. Ed., 278 pages, Enke Verlag, Stuttgart 1998, ISBN 3-432-84100-0 .

Web links