Dabaidi Formation at Dabaidi, Anji County, Zhejiang Province: Llandovery, China
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Pterobranchia
- Graptoloidea
- Climacograptidae
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Climacograptus sp.
Hall 1865
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Pterobranchia
- Graptoloidea
- Diplograptidae
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Diplograptus sp.
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Pterobranchia
- Graptoloidea
- Retiolitidae
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Glyptograptus aff. tamariscus
(Nicholson 1868)
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Strophomenata
- Strophomenida
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Strophomenida indet.
Opik 1934
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| "strophomenoid" | ||||||||||
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Strophomenata
- Orthotetida
- Chilidiopsidae
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Coolinia sp.
Bancroft 1949
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| spelled with current rank as Fardenia (Coolinia) | ||||||||||
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Rhynchonellata
- Orthida
- Dalmanellidae
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Resserella sp.
Bancroft 1928
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Bivalvia
- Modiomorphida
- Modiomorphidae
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Modiomorpha crypta
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Gastropoda
- Murchisoniina
- Hormotomidae
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Hormotoma sp.
(Salter 1859)
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Trilobita
- Phacopida
- Encrinuridae
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Encrinuroides sp.
Reed 1931
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Trilobita
- Proetida
- Proetidae
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Proetus sp.
Steininger 1831
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Trilobita
- Corynexochida
- Illaenidae
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Illaenus sp.
Dalman 1827
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| see common names | ||||||||||
Geography
| Country: | China | State/province: | Zhejiang | County: | Anji |
| Coordinates: | 30.6° North, 119.6° East (view map) | ||||
| Paleocoordinates: | 2.3° South, 123.2° East | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | local area |
Time
| Period: | Silurian | Epoch: | Llandovery |
| 10 m.y. bin: | Silurian 1 | *Epoch: | Early/Lower Llandovery - Middle Llandovery |
| Key time interval: | Llandovery | ||
| Age range of interval: | 443.80000 - 433.40000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Dabaidi | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: Except where otherwise stated, ref. 7624 uses Lower Silurian as equivalent to Llandovery, Middle Silurian as equivalent to Wenlock, and Upper Silurian as equivalent to Ludlow plus Pridoli. | |||||
Lithology and environment
| Primary lithology: | "shale" |
| Secondary lithology: | sandstone |
| Lithology description: "The total thickness of the unit is 1275 m. The beds consist of gray-green shale, purple sandstone in the upper part, and fine-grained sandstone interbedded with siltstone in the lower and middle parts. The formation is characterized by ripple marks and lense-like shale bands. Some of the shales are laminated." | |
| Environment: | marine indet. |
| Geology comments: Correlation chart indicates BA 3 position. | |
Taphonomy
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Database number: | 27741 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2003-01-07 12:13:42 | Last modified: | 2006-09-13 14:01:03 |
| Access level: | the public | Released: | 2003-01-07 12:13:42 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 7624. | E.-z. Mu, A. J. Boucot, X. Chen and J.-y. Rong. 1986. Correlation of the Silurian rocks of China. In A. J. Boucot and W. B. N. Berry (eds.), Geological Society of America Special Paper 202:1-80 [M. Foote/M. Foote/P. Wagner] |