Khok Kruat Formation
| Khok Kruat Formation | |
|---|---|
| Stratigraphic range: Aptian | |
| Type | Geological formation |
| Unit of | Khorat Group |
| Underlies | Maha Sarakham Formation |
| Overlies | Phu Phan Formation |
| Lithology | |
| Primary | Sandstone, Siltstone |
| Other | Conglomerate, Shale |
| Location | |
| Coordinates | 15°54′N 102°00′E / 15.9°N 102.0°E |
| Approximate paleocoordinates | 16°18′N 105°18′E / 16.3°N 105.3°E |
| Region | Indochina |
| Country |  Thailand |
| Extent | Khorat Plateau |
| Type section | |
| Named by | Ward & Bunnag |
| Year defined | 1964 |
  Khok Kruat Formation (Thailand) | |
The Khok Kruat Formation is a rock formation found in northeastern Thailand. It is the uppermost formation of the Khorat Group.[1] It is dated to the Aptian stage of the Early Cretaceous period, and is notable for its fossils of dinosaurs. It is equivalent to the Gres superieurs Formation of Laos.[2] The group is a fluvial formation consisting primarily of red siltstones and sandstones.[1]
Vertebrate fauna
The Khok Kruat Formation has yielded remains of sharks, fishes, turtles, crocodilians and pterosaurs. Phuwiangosaurus-like teeth, Siamosaurus teeth, and fragmentary postcranial remains of spinosaurids have also been recovered from it.[3]
Color key
|
Notes Uncertain or tentative taxa are in small text; |
| Dinosaurs reported from the Khok Kruat Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images |
|
P. sattayaraki[4] |
|
A ceratopsian. |
||||
|
R. suranareae[5] |
||||||
|
S. nimngami[6] |
|
PRC-4, a well-preserved left maxilla, PRC-5, an isolated maxillary tooth and PRC-6, a braincase.[6] |
An iguanodontian ornithopod. |
|||
| S. khoratensis | ||||||
| Siamosaurus | S. sp.[7] | Teeth. | A spinosaurid. | |||
| S. suwati | a composite cranial and postcranial skeleton comprising premaxilla, maxilla, jugal, surangular, prearticular, articular, vertebrae, manual ungual, ischium, tibia, and pedal phalanx. | |||||
See also
References
- ^ a b Eric Buffetaut (2009). Late Palaeozoic and Mesozoic Ecosystems in SE Asia. Geological Society of London. p. 146. ISBN 978-1-86239-275-5.
- ^ Weishampel, David B; et al. (2004). "Dinosaur distribution (Early Cretaceous, Asia)." In: Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. Pp. 563-570. ISBN 0-520-24209-2.
- ^ a b Eric Buffetaut; Varavudh Suteethorn; Jean Le Loeuff; Sasidhorn Khansubha; Haiyan Tong; Kamonlak Wongko (2005). "New dinosaur species from the Upper Triassic Upper Maleri and Lower Dharmaram formations of central India". International Conference on Geology, Geotechnology and Mineral Resources of Indochina (GEOINDO 2005): 575–581.
- ^ Buffetaut, Eric & Suteethorn, Varavudh. (1992). A new species of the ornithischian dinosaur Psittacosaurus from the Early Cretaceous of Thailand. Palaeontology 35: 801-812.
- ^ "A New Iguanodontian Dinosaur from the Lower Cretaceous Khok Kruat Formation, Nakhon Ratchasima in Northeastern Thailand". Acta Geologica Sinica - English Edition. 85 (5): 969–976. 2011. doi:10.1111/j.1755-6724.2011.00230.x.
{{cite journal}}: Unknown parameter|authors=ignored (help) - ^ a b "A new iguanodontian dinosaur from the Khok Kruat Formation (Early Cretaceous, Aptian) of northeastern Thailand". Annales de Paléontologie. 97 (1–2): 51–62. 2011. doi:10.1016/j.annpal.2011.08.001.
{{cite journal}}: Unknown parameter|authors=ignored (help) - ^ Milner, Angela; Buffetaut, Eric; Suteethorn, Varavudh (2007). "A tall-spined spinosaurid theropod from Thailand and the biogeography of spinosaurs". Journal of Vertebrate Paleontology. 27 (supplement 3): 118A.