Moshuiwan near Xiaping, Horizon B, Southeastern Hunan: Late/Upper Hettangian - Early/Lower Sinemurian, China
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
unclassified
|
|||||||
|
Plantae indet.
Haeckel 1866
|
|||||||
|
Bivalvia
- Myalinida
- Inoceramidae
|
|||||||
|
Pseudomytiloides yizhangensis
|
1 specimen | ||||||
|
Bivalvia
- Pectinida
- Pectinidae
|
|||||||
|
Hunanonectes sanduensis
Fang 1978
|
3 specimens | ||||||
|
Bivalvia
- Pholadida
- Pleuromyidae
|
|||||||
|
Pleuromya xiangensis n. sp.
|
1 specimen | ||||||
| original and current combination Myacites (Pleuromya) | |||||||
| see common names | |||||||
Geography
| Country: | China |
| Coordinates: | 25.7° North, 113.2° East (view map) |
| Paleocoordinates: | 35.6° North, 117.8° East |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | small collection |
Time
| Period: | Jurassic | Epoch: | Early/Lower Jurassic |
| 10 m.y. bin: | Jurassic 1 | ||
| Key time interval: | Late/Upper Hettangian - Early/Lower Sinemurian | ||
| Age range of interval: | 201.40000 - 192.90000 m.y. ago |
Stratigraphy
| Formation: | Xintianmen | Local bed: | Horizon B | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Horizon B belongs to the lower Xintianmen Formation, either to late Hettangian or early Sinemurian deposits. The Xintianmen Formation mainly is of early Sinemurian age but probably comprises late Hettangian deposits in its lower part... It seems probable that the assemblage of horizon A and possibly also that of horizon B are of (late) Hettangian age and that the lower Xintianmen Formation comprises late Hettangian to early Sinemurian deposits. | |||||
Lithology and environment
| Primary lithology: | lithified mudstone |
| Lithology description: In the Xintianmen Formation, well layered sandstones and mudstones alternate. Marine invertebrates occur in a few horizons only, in mudstones as well as sandstones. The horizon B consists of dark grey mudstones containing some lighter portions and sometimes yield pyritic nodules. | |
| Environment: | transition zone/lower shoreface |
| Geology comments: This succession of the Xintianmen Formation consists of shallow-marine, siliciclastic deposits. Frequent occurence of lenticular beddings and ripples of different kinds in the mudstones, as well as sandstone layers overlying erosional surfaces indicate that the deposition took place above the storm wave base, probably in near-shore environments. The latter is also indicated by the frequent occurence of remains of land plants. | |
Taphonomy
| Modes of preservation: | body,cast,mold/impression,original calcite |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | good |
| Articulated whole bodies: | some |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 59622 | ||
| Authorizer: | M. Aberhan | Enterer: | S. Nurnberg |
| Modifier: | S. Nurnberg | Research group: | marine invertebrate |
| Created: | 2006-04-05 05:49:39 | Last modified: | 2006-04-06 04:07:27 |
| Access level: | the public | Released: | 2006-04-05 05:49:39 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 17066. | F. Stiller. 2006. Early Jurassic shallow-marine bivalves from Xiaping, southern Hunan, China. Palaeontographica Abteilung A 274(1-2):1-70 [M. Aberhan/S. Nurnberg] |