Bed 49, Maidiping Sect, Jiulaodong Fm, China - Conway Morris and Menge 1990: Atdabanian, China
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Tommotiida
- Tannuolinidae
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Tannuolina zhangwentangi
Qian and Bengtson 1989
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119 specimens | ||||||
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Tommotiida
- Lapworthellidae
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Lapworthella rete
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7 specimens | ||||||
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Aculifera
- Halkieriidae
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Sinosachites flabelliformis
He 1980
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Yue 2004 | ||||||
| see common names | |||||||
Geography
| Country: | China | County: | Sichuan |
| Coordinates: | 29.6° North, 103.5° East (view map) | ||
| Paleocoordinates: | 30.9° North, 164.1° 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: | Jiulaodong | ||
| Local section: | Maidiping section | Local bed: | bed 49, 155 m above locally defined Precambrian-Cambrian boundary |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | pebbly lithified argillaceous,calcareous dolomite |
| Includes fossils? | Y |
| Lithology description: rounded pebbles, small irregular casts with iron magnesium coatings, matrix of fine grained calcareous/argillaceous material (dolomite) | |
Taphonomy
Collection methods and comments
| Collection methods: | bulk,chemical,field collection |
| Collection size: | 126 specimens |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Preservation takes the form of steinkerns of sclerites with both secondary phosphatization and apatite recrystalization. Specimens collected during a Royal Society-Academia Sinica Exchange Scheme. | |
Metadata
| Database number: | 8331 | ||
| Authorizer: | M. Patzkowsky, W. Kiessling | Enterer: | P. Borkow, U. Merkel | Research group: | marine invertebrate |
| Created: | 2000-07-06 22:26:24 | Last modified: | 2001-03-27 12:03:21 |
| Access level: | the public | Released: | 2001-03-27 12:03:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 572. | S. Conway Morris and M. Chen. 1990. Tommotiids from the Lower Cambrian of South China. Journal of Paleontology 64(2):169-184 [M. Patzkowsky/P. Borkow/P. Wagner] |
Secondary references:
| 35833 | Z. Yue. 2004. Early Cambrian small shelly fossil Sinosachites from southwest China. Acta Palaeontologica Sinica 43(2):164-178 [W. Kiessling/U. Merkel] |