Serpukhovium
| system | Subsystem | step | ≈ age ( mya ) |
|---|---|---|---|
| higher | higher | higher | younger |
| Carbon | Pennsylvania | Gzhelium | 298.9 ⬍ 303.7 |
| Kasimovium | 303.7 ⬍ 307 |
||
| Moskovium | 307 ⬍ 315.2 |
||
| Bashkirium | 315.2 ⬍ 323.2 |
||
| Mississippium | Serpukhovium | 323.2 ⬍ 330.9 |
|
| Visa | 330.9 ⬍ 346.7 |
||
| Tournaisium | 346.7 ⬍ 358.9 |
||
| deeper | deeper | deeper | older |
The Serpukhovian is the highest chronostratigraphic level of the Mississippian ( Carboniferous ) in the history of the earth . In absolute terms, the level extends geochronologically from about 330.9 million to about 323.2 million years. The stage follows the Visa and is replaced by the Bashkirium .
Naming and history
The stage is named after the town of Serpukhov near Moscow ( Russia ). The name and level were suggested by SN Nikitin (1890).
Definition and GSSP
The lower limit of the level is determined by the first appearance of Conodonten -type Lochriea crusiformis defined. The stage and with it the Mississippium ends with the first appearance of the conodont species Declinognathodus nodiliferus s. l. An official reference profile of the International Commission for Stratigraphy ("Global Stratotype Section and Point") for the Serpukhovian has not yet been established.
Breakdown
The Serpukhovium is divided into four conodont zones:
- Gnathodus postbilineatus zone
- Gnathodus bollandensis zone
- Lochria cruciformis zone
- Lochria ziegleri zone
literature
- Felix Gradstein, Jim Ogg, Jim & Alan Smith: A Geologic timescale. Cambridge University Press 2004, ISBN 978-0-521-78673-7
- H. Richard Lane, Paul L. Brenckle, JF Baesemann, and Barry Richards: The IUGS boundary in the middle of the Carboniferous: Arrow Canyon, Nevada, USA. In: Episodes. 22 (4): 272-283, Beijing 1999.
- Hans Murawski & Wilhelm Meyer: Geological dictionary . 10., rework. u. exp. Ed., 278 pages, Enke Verlag, Stuttgart 1998, ISBN 3-432-84100-0 .
Individual evidence
- ^ SN Nikitin: Carboniferous deposits of the Moscow region and artesian waters in the vicinity of Moscow. Mémoires du Comité Géologique, 5: 1-182, St. Petersburg 1890.
- ^ Barry Richards: Current Status of the International Carboniferous Time Scale. In: SG Lucas et al. (Ed.): The Carboniferous-Permian Transition. New Mexico Museum of Natural History and Science, Bulletin, 60: 348-353, 2013 PDF
Web links
- German Stratigraphic Commission, Manfred Menning (Hrsg.): Stratigraphische Tisch von Deutschland 2002 . Potsdam 2002, ISBN 3-00-010197-7 (1 sheet, Stratigraphie.de [PDF; 6.6 MB ]).
- Commission for the paleontological and stratigraphic research of Austria of the Austrian Academy of Sciences (Ed.): The Stratigraphic Table of Austria (sedimentary layer sequences). Vienna 2004 (PDF; 376 kB)
- International Chronostratigraphic Chart 2015 (PDF)