Earth:Middle Triassic
| Middle Triassic | |
|---|---|
| 246.7 – ~237 Ma | |
.png) A map of Earth as it appeared 240 million years ago during the Middle Triassic Epoch, Ladinian Age | |
 Middle Triassic aged Muschelkalk (Schaumkalk) in Baden-Württemberg, Germany | |
| Chronology | |
| Etymology | |
| Name formality | Formal |
| Usage information | |
| Celestial body | Earth |
| Regional usage | Global (ICS) |
| Time scale(s) used | ICS Time Scale |
| Definition | |
| Chronological unit | Epoch |
| Stratigraphic unit | Series |
| Time span formality | Formal |
| Lower boundary definition | Not formally defined |
| Lower boundary definition candidates |
|
| Lower boundary GSSP candidate section(s) |
|
| Upper boundary definition | FAD of the Ammonite Daxatina canadensis |
| Upper boundary GSSP | Prati di Stuores, Dolomites, Italy [ ⚑ ] 46°31′37″N 11°55′49″E / 46.5269°N 11.9303°E |
| GSSP ratified | 2008[1] |
In the geologic timescale, the Middle Triassic is the second of three epochs of the Triassic period or the middle of three series in which the Triassic system is divided in chronostratigraphy. The Middle Triassic spans the time between 247.2 Ma and 237 Ma (million years ago). It is preceded by the Early Triassic Epoch and followed by the Late Triassic Epoch. The Middle Triassic is divided into the Anisian and Ladinian ages or stages.[2]
Formerly the middle series in the Triassic was also known as Muschelkalk. This name is now only used for a specific unit of rock strata with approximately Middle Triassic age, found in western Europe. The Ashfield Shale and Bringelly Shale of western Sydney date to this epoch, with the former featuring fluvial fossils from that era.[3][4]
Middle Triassic life
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Mixosaurus cornalianus restoration, a Middle Triassic ichthyosaur
References
- ↑ Mietto, Paolo; Manfrin, Stefano; Preto, Nereo; Rigo, Manuel; Roghi, Guido; Furin, Stefano; Gianolla, Piero; Posenato, Renato et al. (September 2012). "The Global Boundary Stratotype Section and Point (GSSP) of the Carnian Stage (Late Triassic) at Prati Di Stuores/Stuores Wiesen Section (Southern Alps, NE Italy)". Episodes 35 (3): 414–430. doi:10.18814/epiiugs/2012/v35i3/003. https://stratigraphy.org/gssps/files/carnian.pdf. Retrieved 13 December 2020.
- ↑ "ICS - Chart/Time Scale". https://stratigraphy.org/ICSchart/ChronostratChart2024-12.pdf.
- ↑ Roy M. Farman and Phil R. Bell (2020). "Australia's earliest tetrapod swimming traces from the Hawkesbury Sandstone (Middle Triassic) of the Sydney Basin". Journal of Paleontology (Cambridge University Press) 94 (5): 966–978. https://www.cambridge.org/core/journals/journal-of-paleontology/article/australias-earliest-tetrapod-swimming-traces-from-the-hawkesbury-sandstone-middle-triassic-of-the-sydney-basin/2C787D68A8F2F300B2111A0E68E5981C.
- ↑ "Sampling and Mineralogy of Bringelly Shale". The University of Sydney. https://ses.library.usyd.edu.au/bitstream/handle/2123/1520/04chapter3.pdf?sequence=9&isAllowed=y.
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