Yurtus VI (Section 1) - [Yurtus Fm]: Tommotian - Atdabanian, China
collected by Conway Morris & Chapman 1991
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Cambroclavida
- Zhijinitidae
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Zhijinites claviformis
Qian and Xiao 1984
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Aculifera
- Halkieriidae
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Halkieria mira
(Qian and Xiao 1984)
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Conway Morris and Chapman 1997 | ||||||
see common names |
Geography
Country: | China | State/province: | Xinjiang |
Coordinates: | 40.5° North, 79.1° East (view map) | ||
Paleocoordinates: | 11.6° South, 135.4° East | ||
Basis of coordinate: | based on nearby landmark | ||
Geographic resolution: | outcrop |
Time
Period: | Cambrian | ||
10 m.y. bin: | Cambrian 2 | ||
*Period: | Early/Lower Cambrian | *Epoch: | Middle Caerfai |
*International age/stage: | Atdabanian | ||
Key time interval: | Tommotian - Atdabanian | ||
Age range of interval: | 525.50000 - 515.60000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Yurtus | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: LITHOSTRATIGRAPHY: From the Yurtus Fm, which unconformably overlies the Qigebulak Fm and is unconformably overlain by the Xiaoerbulak Fm. AGE: Most likely age is late Tommotian to early Atdabanian, on the basis of various biostratigraphic indicators. STRATIGRAPHIC POSITION: From multiple beds within local section, mostly concentrated towards top of the section. |
Lithology and environment
Primary lithology: | phosphatic lithified "limestone" |
Includes fossils? | Y |
Lithology description: LITHOLOGY: Not stated in text, but apparently a phosphatic limestone. LITHIFICATION: Lithified on the basis of facies description and sample preparation. | |
Environment: | marine indet. |
Geology comments: ENVIRONMENT: Not stated in text. |
Taphonomy
Modes of preservation: | body,cast,replaced with phosphate |
Collection methods and comments
Collection excludes: | some genera | ||
Collection methods: | bulk,chemical,field collection | ||
Reason for describing collection: | taxonomic analysis | ||
Museum repositories: | SM | ||
Collectors: | Conway Morris & Chapman | Collection dates: | 1991 |
Collection method comments: COLLECTOR: Conway Morris and Chapman, 1991. REPOSITORY: SM (=not stated). | |||
Taxonomic list comments:COVERAGE: Not exhaustive, but including representative and important forms. NOMENCLATURE: Authoritative publication, with modern nomenclature and species resolution identifications. |
Metadata
Also known as: | SSF 26.1 | ||
Database number: | 6814 | ||
Authorizer: | M. Patzkowsky, A. Hendy | Enterer: | P. Borkow, A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Collections that are a subset of this one: | |||
Created: | 2000-03-23 08:18:31 | Last modified: | 2009-03-16 00:16:33 |
Access level: | the public | Released: | 2000-03-23 08:18:31 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
417. | S. Conway Morris, J. S. Crampton, X. Bing and A.J. Chapman. 1997. Lower Cambrian Cambroclaves (Incertae sedis) from Xinjiang, China, with comments on the morphological variability of sclerites. Palaeontology 40(1):167-189 [M. Patzkowsky/P. Borkow/J. Alroy] |
Secondary references:
29416 | S. Conway Morris and A. J. Chapman. 1997. Lower Cambrian Halkieriids and other coeloscleritomorphs from Aksu-Wushi, Xinjiang, China. Journal of Paleontology 71(1):6-22 [A. Hendy/A. Hendy/A. Hendy] |