Aksu Phosphorite Mine (Section 3) - [Yurtus Fm]: Atdabanian, China
collected by Conway Morris & Chapman 1991
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Chlorophyceae
- Dasycladales
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Cambroclavus bicornis
(Qian and Xiao 1984)
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Cambroclavida
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Wushichites minutus
Qian and Xiao 1984
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Parazhijinites guizhouensis
(Qian and Yin 1984)
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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: | 41.2° North, 80.3° East (view map) | ||
| Paleocoordinates: | 12.2° South, 136.2° East | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cambrian | Epoch: | Series 2 |
| Stage: | Stage 3 | 10 m.y. bin: | Cambrian 2 |
| *Period: | Early/Lower Cambrian | *Epoch: | Middle Caerfai |
| *International age/stage: | Atdabanian | ||
| Key time interval: | Atdabanian | ||
| Age range of interval: | 521 - 515.6 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Yurtus | ||||
| Stratigraphic resolution: | formation | ||||
| 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; here place in Adtabanian on the basis of stratigraphic position and more recent evidence. STRATIGRAPHIC POSITION: From multiple beds within local section, mostly concentrated towards top of the section. | |||||
Lithology and environment
| Primary lithology: | intraclastic lithified "limestone" |
| Includes fossils? | Y |
| Lithology description: LITHOLOGY: Clastic and impure 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,acetic,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 (Sedgewick Museum). | |||
| 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 26.3 | ||
| Database number: | 7824 | ||
| Authorizer: | M. Patzkowsky, A. Hendy | Enterer: | P. Borkow, A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2000-06-03 23:37:06 | Last modified: | 2009-03-16 00:27:04 |
| Access level: | the public | Released: | 2000-06-03 23:37:06 |
| 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] |