Terreneuvium
| system | series | step | ≈ age ( mya ) |
|---|---|---|---|
| higher | higher | higher | younger |
| Cambrian | Furongium | 10th stage | 485.4 ⬍ 489.5 |
| Jiangshanium | 489.5 ⬍ 494 |
||
| Paibium | 494 ⬍ 497 |
||
| Miaolingium | Guzhangium | 497 ⬍ 500.5 |
|
| Drumium | 500.5 ⬍ 504.5 |
||
| Wuliuum | 504.5 ⬍ 509 |
||
| 2nd series | 4th stage | 509 ⬍ 514 |
|
| 3rd stage | 514 ⬍ 521 |
||
| Terreneuvium | 2nd stage | 521 ⬍ 529 |
|
| Fortunium | 529 ⬍ 541 |
||
| deeper | |||
The Terreneuvian is the lower chronostratigraphic series of the Cambrian in geological history. The series is dated to about the period from about 541 to about 521 million years. The Terreneuvium is overlaid by an as yet unnamed series (2nd series) of the Cambrian. The Terreneuvian follows the Ediacarian system (or period) of the Neoproterozoic era ( Precambrian ).
Naming and history
The series was officially named after the French name Newfoundland ( Terre-Neuve ) in 2007 . It is part of the four-part concept of the Cambrian, which was proposed in 1998 after the lower limit of the system was redefined (see below). The Terreneuvium covers a period or part of the geological tradition before the appearance of the trilobites in the fossil record . It was therefore traditionally assigned to the Upper Precambrian .
Definition and GSSP
The beginning of the Terreneuvian, Fortunian , Cambrian and thus the Paleozoic and Phanerozoic is defined by the first appearance of the trace fossil Treptichnus (Phycodes) pedum . Also, the limit is very close to a carbon isotope negative anomaly. The upper limit (or rather the base of the 2nd series of the Cambrian) has not yet been formally determined, but will likely be based on the first appearance of the trilobites . The GSSP of the Terreneuvium series (and the Fortunium stage) is an outcrop of the Chapel Island Formation on the cliff Fortune Head on the Burin Peninsula in the southeast of the Canadian island of Newfoundland . It was already determined as a reference for the base of the Cambrian in 1992, 15 years before the official introduction of the name "Terreneuvium".
Breakdown
The Terreneuvium is divided into two chronostratigraphic levels ; the upper level has not yet been formally named.
-
System : Cambrian (541-485.4 mya )
- Series : Furongium (497-485.4 mya)
- Series: Miaolingium (509–497 mya)
- Series: Cambrian 2nd series (521–509 mya)
- Series: Terreneuvium (541–521 mya)
literature
General
- Martin Brasier, John Cowie and Michael Taylor: Decision on the Precambrian-Cambrian boundary stratotype. Episodes. Vol. 7, No. 1/2, 1994, pp. 95-100, PDF .
- Shanchi Peng, Loren E. Babcock, Roger A. Cooper: The Cambrian Period. Pp. 437-488 in: Felix M. Gradstein, James G. Ogg, Mark Schmitz, Gabi Ogg: The Geologic Time Scale 2012. Volume 2. Elsevier 2012, ISBN 978-0-44-459434-1 .
On the geological tradition of the furongium in the German-speaking area
- 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 2004 (sedimentary layer sequences). Vienna 2004 (1 sheet, uni-graz.at [PDF; 376 KB])