List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
unclassified
|
||||||||||
|
Mammalia
- Proboscidea
- Stegodontidae
|
||||||||||
|
Stegodontidae indet.
Osborn 1918
|
||||||||||
| "stegolophodont mastodon" | ||||||||||
|
Mammalia
- Bovidae
|
||||||||||
|
Eotragus sp.
Pilgrim 1939
|
||||||||||
|
Mammalia
- Tragulidae
|
||||||||||
|
Siamotragulus sp.
Thomas et al. 1990
|
||||||||||
|
Mammalia
- Suidae
|
||||||||||
| see common names | ||||||||||
Geography
| Country: | Thailand |
| Coordinates: | 18.9° North, 100.3° East (view map) |
| Paleocoordinates: | 16.6° North, 100.8° East (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
Stratigraphy
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: "Middle Miocene": upper and middle lignite seams are in a normal polarity zone correlated with anything between chron C5ABn and chron C5n, but equivalent to "the top of... MN 8 and the base of MN 9" according to Pickford et al. 2004 | |||||
Lithology and environment
| Primary lithology: | lignite |
| Secondary lithology: | mudstone |
| Includes fossils? | Y |
| Lithology description: "The sediments consist mainly of mudstones and sandstones incalated with paleosols and several lignite beds [yielding the fossils]"; section shows a long interval of "purple mudstones" separating the lower and middle plus upper lignite seams, with the latter separated by "purple mudstones" and "sandy clays" | |
| Environment: | mire/swamp |
| Geology comments: "Paleosols indicate some climatic seasonality... vegetation corresponded to a mosaic of freshwater swamps [presumably yielding the lignites], with a Syzygium-dominated lowland forest" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: specimens have "TF" museum numbers and clearly derive from different collections than the "CMu" material collected by the Japan-Thailand Paleontology Expedition from the Chiang Muan Basin | |
| Taxonomic list comments:hominid specimens are from the middle and upper lignite seams in the section, but some mammal fossils are from the lower lignite seam and carbonaceous shales below it | |
Metadata
| Also known as: | Chiang Muan Basin | ||
| Database number: | 71580 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | vertebrate |
| Created: | 2007-04-29 20:54:53 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2007-04-29 20:54:51 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 24182. | Y. Chaimanee, D. Jolly, M. Benammi, P. Tafforeau, D. Duzer, I. Moussa, and J.-J. Jaeger. 2003. A Middle Miocene hominoid from Thailand and orangutan origins. Nature 422:61-65 [J. Alroy/J. Alroy] |