Phra Wihan Formation
Phra Wihan Formation Stratigraphic range: Berriasian-Barremian ~ | |
---|---|
Type | Geological formation |
Unit of | Khorat Group |
Underlies | Sao Khua Formation |
Overlies | Phu Kradung Formation |
Thickness | 150 m (490 ft) |
Lithology | |
Primary | Sandstone |
Other | Siltstone, mudstone, conglomerate |
Location | |
Coordinates | 16°06′N 103°54′E / 16.1°N 103.9°ECoordinates: 16°06′N 103°54′E / 16.1°N 103.9°E |
Approximate paleocoordinates | 14°18′N 111°24′E / 14.3°N 111.4°E |
Region | Northeast Thailand () |
Country | ![]() |
Extent | Khorat Plateau |
Type section | |
Named for | , an 11th-century Khmer Temple (Khao Phra Wihan National Park) |
Named by | Ward & Bunnag |
Year defined | 1964 |
![]() ![]() Phra Wihan Formation (Thailand) |
The Early Cretaceous Phra Wihan Formation is the second lowest member of the Mesozoic Khorat Group which outcrops in Northeast Thailand.
Comprises fine- to coarse-grained sheet and channelled sandstone beds and rarer variegated siltstone and mudstone. Intermittent conglomerate beds.
Deposited in a fluvial environment dominated by high-energy, shallow braided rivers with subordinate lower energy meandering river systems and associated flood plains.
The Phra Wihan Formation is considered to be Berriasian-Barremian in age based on palynological analysis.[1][2]
Sauropod (fossil) tracks have been recorded from this formation.[3]
See also[]
- List of dinosaur-bearing rock formations
- List of stratigraphic units with sauropodomorph tracks
- Sauropod tracks
- List of stratigraphic units with sauropodomorph tracks
References[]
- ^ Suteetorn and Jarnyahran (1986). "Geological Map of Thailand." Sheet NE 48-14 1:250,000.
- ^ Racey and Goodall (2009). "Late Palaeozoic and Mesozoic Ecosystems in SE Asia". Geological Society. London. Special Publication 315 Pp 69-84.
- ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
Bibliography[]
- The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21. ISBN 0-520-24209-2 ; , and . 2004.
Categories:
- Geologic formations of Thailand
- Lower Cretaceous Series of Asia
- Cretaceous Thailand
- Barremian Stage
- Berriasian Stage
- Hauterivian Stage
- Valanginian Stage
- Sandstone formations
- Ichnofossiliferous formations
- Paleontology in Thailand