Na Duong Mine level 11: Bartonian - Late/Upper Eocene, Vietnam
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Cristaria mothanica
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Bivalvia
- Unionida
- Unionidae
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Unionidae indet.
Rafinesque 1820
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| undescribed large alatiform unionid | ||||||||||
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Cuneopsis indet.
Simpson 1900
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Gastropoda
- Viviparidae
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Viviparidae indet.
Gray 1847
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Gastropoda
- Thiaridae
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? Tarebia indet.
Adams and Adams 1854
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Actinopteri
- Cypriniformes
- Cyprinidae
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Xenocyprinae indet.
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? Acheilognathidae indet.
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| spelled with current rank as Acheilognathinae | ||||||||||
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Barbinae indet.
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Planktophaga minuta n. gen., n. sp.
Böhme et al. 2013
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Cultrinae indet.
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| see common names | ||||||||||
Geography
| Country: | Vietnam | State/province: | Lang Son | County: | Loc Binh |
| Coordinates: | 21.8° North, 106.1° East (view map) | ||||
| Paleocoordinates: | 21.6° North, 105.0° East | ||||
| Basis of coordinate: | stated in text |
Time
| Period: | Paleogene | Epoch: | Eocene |
| 10 m.y. bin: | Cenozoic 3 | ||
| Key time interval: | Bartonian - Late/Upper Eocene | ||
| Age range of interval: | 41.20000 - 33.90000 m.y. ago |
Stratigraphy
| Formation: | Rhin Chua | ||||
| Stratigraphy comments: characterized as "late Middle to Late Eocene" |
Lithology and environment
| Primary lithology: | claystone |
| Lithology description: The sediments of the Rhin Chua Formation consist predominantly of marly claystones. Thin beds of fine-grained sandstone with symmetric ripple marks occur in the upper part of the section (Fig. 3F). Weathering turns the brownish colour of the fresh claystones into reddish to purple colours, indicating the secondary formation of haematite. Weathered outcrops show a cyclic occurrence of more solid horizons at intervals of ~ 0.5 m. Frequently, the claystones are bioturbated, in particular near the base and top of the succession (Fig. 3E). These bioturbated parts of the profile contain abundant fossil remains of benthic (mollusk shells) and nektonic fauna (cyprinid fish teeth). | |
| Environment: | lacustrine - large |
| Geology comments: characterized as deep lake | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection excludes: | ichnofossils |
| Collection methods: | salvage,selective quarrying,sieve,field collection |
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Database number: | 169422 | ||
| Authorizer: | P. Holroyd | Enterer: | P. Holroyd |
| Modifier: | P. Holroyd | Research group: | freshwater,vertebrate |
| Created: | 2015-05-25 16:41:14 | Last modified: | 2015-05-25 17:10:55 |
| Access level: | the public | Released: | 2015-05-25 16:41:14 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 55373. | M. Böhme, M. Aiglstorfer, P.-O. Antoine, E. Appel, P. Havlik, G. Métais, Laq The Phuc, S. Schneider, F. Setzer, R. Tappert, Dang Ngoc Tran and D. J. Uhl Prieto. 2013. Na Duong (northern Vietnam) – an exceptional window into Eocene ecosystems from Southeast Asia. Zitteliana A 53:120-167 [P. Holroyd/P. Holroyd/M. Carrano] |