Cambrian Stage 2
| Cambrian Stage 2 | |||||||
|---|---|---|---|---|---|---|---|
| Chronology | |||||||
| |||||||
| |||||||
Subdivision of the Cambrian according to the Archaeocyathids | |||||||
| Lower boundary GSSP candidate section(s) | None | ||||||
| Upper boundary definition | Not formally defined | ||||||
| Upper boundary definition candidates | FAD of Trilobites | ||||||
| Upper boundary GSSP candidate section(s) | None | ||||||
Stage 2 of the Cambrian is the unnamed upper stage of the Terreneuvian Series. It lies atop the Fortunian and below Stage 3 of the Cambrian. It is commonly referred to as the Tommotian, after the Cambrian stratigraphy of Siberia.[2][3] Neither the upper nor lower boundary has yet been defined by the International Commission on Stratigraphy.[4][5] The preferred definitions for the lower boundary are the
trilobites around 521 million years ago.[4]
Naming
The name "Laolinian" after the Laolin village in Yunnan, China, was proposed for the Stage 2 in 2012.[9]
Stratotype
Possible candidates for a
Siberian Platform.[10]
References
- ^ "Chart/Time Scale". stratigraphy.org. International Commission on Stratigraphy.
- S2CID 3884375.
- S2CID 132867265.
- ^ a b "GSSP List ICS". ICS. Archived from the original on 15 November 2012. Retrieved 2024-03-26.
- doi:10.31857/S0869592X20020064. Archived (PDF) from the original on 2024-01-30.)
{{cite journal}}: CS1 maint: multiple names: authors list (link - ^ "ISCS Working Groups: Working Group on the Stage 2 GSSP". International Subcommission on Cambrian Stratigraphy. Archived from the original on 2023-09-26.
- PMID 36829538.)
{{cite journal}}: CS1 maint: multiple names: authors list (link - ISSN 0031-0182. Retrieved 2024-03-26 – via Elsevier Science Direct.
- doi:10.13140/RG.2.1.4198.1842.)
{{cite journal}}: CS1 maint: multiple names: authors list (link - S2CID 129506892.
External links
- "GSSP Table - Paleozoic Era". Geologic Timescale Foundation. Archived from the original on 2023-10-08. Retrieved 2024-03-26.
- "GSSPs - The Cambrian System 2019". International Commission on Stratigraphy. Archived from the original on 2023-07-21.
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