Phu Kradung
Description
Source: Wikipédia
The Early Cretaceous Phu Kradung Formation is the lowest member of the Mesozoic Khorat Group which outcrops on the Khorat Plateau in Isan, Thailand. This geological formation consists of micaceous, brown to reddish-brown siltstone beds with minor brown and grey shale and sandstone beds. Occasional lime-noduled conglomerate occurs.
The Phu Kradung Formation sediments were deposited in a lake-dominated floodplain cut by meandering and occasionally braided river channels.
The Phu Kradung Formation is considered, on the basis of recent vertebrae fossil discoveries, to be Late Jurassic in age. However, new palynology and biostratigraphic data suggests an age of Early Cretaceous for the upper section.
More recent datations trought detrital zircon U–Pb ages of samples from the conglomerates have stablished a lowermost age of late Early Jurassic (Toarcian), with a maximum depositional age of 180 Ma, which is older than the previously estimated Late Jurassic–Berriasian age based on fossil evidence. This discrepancy suggests the absence of syn-depositional zircons. The zircon data also help clarify the timing of the Indosinian III Event, placing the Indosinian III Unconformity between 201 and 182 Ma, marking a hiatus of about 20 million years. The Phu Kradung Formation deposition likely occurred after the Nam Phong Formation and may correlate with the Upper part of the last in the Khorat Basin subsurface.
Dinosaur remains have been recovered from this formation, although few have been referred to a specific genus.
Chalawan, an extinct genus of pholidosaurid mesoeucrocodylian, is currently known solely from its holotype, a nearly complete mandible collected in the early 1980s from a road-cut near the town of Nong Bua Lamphu in the upper part of the Phu Kradung Formation. This single specimen is the most well preserved vertebrate fossil that has been found from the formation. It contains a single species, Chalawan thailandicus.
Découvertes
Source: The Paleobiology Database
Site(s) correspondant(s) à cette formation: 6
Ban Khok Sanam, Phu Kradung : Kalasin - Kham Muang 14080 30939 31086 31132 36763 66469 77164 83628 location estimated - exact site not found; located "a short distance" from Phu Kradung dinosaur site; Ban Khok Sanam locality, Kham Muang District, Kalasin Province- Stegosauridae identifié comme Siamodracon altispinus n. gen. n. sp.
- Euhelopodidae
- Theropoda
- Neornithischia
- Bon Kham Phok : Mukdahan - ? 26533 41617 77164 82062 near village of (Ban) Kham Phok, NE Thailand
- Metriacanthosauridae identifié comme Sinraptoridae indet.
- Theropoda
- Ornithischia
- Bon Kham Phok 2 : Mukdahan - ? 26533 77164 near village of (Ban) Kham Phok, NE Thailand - this is the "nearby outcrop" described in ref 26533
- Dan Luang : Mukdahan - Kamcha-I 30939 31132 46015 83628 Dan Luang
- Phu Dan Ma : Kalasin - Kuchi Narai District 46015 Hill of Phu Dan Ma (locality KS26)
- Phu Noi [Phu Kradung Formation], PNB layer : Kalasin - Kham Muang 51795 83628 83629 85349 88654 The Phu Noi locality is located on the flank of a small hill near the village (Ban) Dinji [Ban Din Chi], Kham Muang District, Kalasin Province. Within the Kalasin Geopark.
Publication(s)
La base comprend 16 publication(s).
Source: The Paleobiology Database
- ↑1 2 E. Buffetaut, V. Suteethorn, and H. Tong, Y. Chaimanee, S. Khansubha. 1997. New dinosaur discoveries in the Jurassic and Cretaceous of northeastern Thailand. Proceedings of the International Conference on Stratigraphy and Tectonic Evolution of Southeast Asia and the South Pacific, 19-24 August 1997, Bangkok
- ↑1 E. Buffetaut and V. Suteethorn. 1998. Early Cretaceous dinosaurs from Thailand and their bearing on the early evolution and biostratigraphical history of some groups of Cretaceous dinosaurs. Lower and Middle Cretaceous Terrestrial Ecosystems, New Mexico Museum of Natural History and Science Bulletin 14:205-210
- ↑1 2 R. Amiot, E. Buffetaut, and C. Lécuyer, V. Fernandez, F. Fourel, F. Martineau, V. Suteethorn. 2009. Oxygen isotope composition of continental vertebrate apatites from Mesozoic formations of Thailand; environmental and ecological significance. Late Palaeozoic and Mesozoic Ecosystems in SE Asia. The Geological Society of London, Special Publication 315:271-283 (https://doi.org/10.1144/sp315.19)
- ↑1 2 3 E. Buffetaut, V. Suteethorn, and J. Le Loeuff, G. Cuny, H. Tong, S. Khansubha. 2002. A review of the sauropod dinosaurs of Thailand. The Symposium on Geology of Thailand, Bangkok, 26-31 August 2002
- ↑1 E. Buffetaut. 1998. The succession of dinosaur assemblages in Thailand. I Encontro Internacional sobre Paleobiologia dos Dinossáurios. Museu Nacional de História Natural, Lisboa
- ↑1 R. E. Ulansky. 2014. Evolyutsiya ctegozavrov (Dinosauria; Ornithischia) [Evolution of the stegosaurs (Dinosauria; Ornithischia)]. Dinologia
- ↑1 2 3 E. Buffetaut, V. Suteethorn, and H. Tong. 2006. Dinosaur assemblages from Thailand: a comparison with Chinese faunas. Papers from the 2005 Heyuan International Dinosaur Symposium
- ↑1 2 3 S. Manitkoon, U. Deesri, and P. Warapeang, T. Nonsrirach, P. Chanthasit. 2023. Ornithischian dinosaurs in Southeast Asia: a review with palaeobiogeographic implications. Fossil Record 26(1):1-25 (https://doi.org/10.3897/fr.26.93456)
- ↑1 2 E. Buffetaut and V. Suteethorn. 2006. A sinraptorid theropod from Thailand. 4th Annual Meeting of the European Association of Vertebrate Palaeontologists. Hantkeniana (https://doi.org/10.2113/gssgfbull.178.6.497)
- ↑1 2 3 E. Buffetaut and V. Suteethorn. 2007. A sinraptorid theropod (Dinosauria: Saurischia) from the Phu Kradung Formation of northeastern Thailand. Bulletin de la Société Géologique de France 178(6):497-502 (https://doi.org/10.2113/gssgfbull.178.6.497)
- ↑1 M. T. Carrano, R. B. J. Benson, and S. D. Sampson. 2012. The phylogeny of Tetanurae (Dinosauria: Theropoda). Journal of Systematic Palaeontology 10(2):211-300 (https://doi.org/10.1080/14772019.2011.630927)
- ↑1 2 3 S. Suteethorn, J. L. Loeuff, and E. Buffetaut, V. Suteethorn, K. Wongko. 2013. First evidence of a mamenchisaurid dinosaur from the Late Jurassic/Early Cretaceous Phu Kradung Formation of Thailand. Acta Palaeontologica Polonica 58(3):459-469 (https://doi.org/10.4202/app.2009.0155)
- ↑1 2 H. Tong, W. Naksri, and E. Buffetaut, V. Suteethorn, S. Suteethorn, U. Deesri, S. Sila, P. Chanthasit, J. Claude. 2014. A new primitive eucryptodiran turtle from the Upper Jurassic Phu Kradung Formation of the Khorat Plateau, NE Thailand. Geological Magazine (https://doi.org/10.1017/S0016756814000223)
- ↑1 E. Buffetaut, S. Suteethorn, and V. Suteethorn, U. Deesri, H. Tong. 2014. Preliminary note on a small ornithopod dinosaur from the Phu Kradung Formation (terminal Jurassic–basal Cretaceous) of Phu Noi, north-eastern Thailand. Journal of Science and Technology Mahasarakham University 33:344-347
- ↑1 S. Manitkoon, U. Deesri, and B. Khalloufi, T. Nonsrirach, V. Suteethorn, P. Chanthasit, W. Boonla, E. Buffetaut. 2023. A new basal neornithischian dinosaur from the Phu Kradung Formation (Upper Jurassic) of northeastern Thailand. Diversity 15(7):851:1-32 (https://doi.org/10.3390/d15070851)
- ↑1 W. Chowchuvech, S. Manitkoon, and P. Chanthasit, C. Ketwetsuriya. 2024. The first occurrence of a basal tyrannosauroid in southeast Asia: dental evidence from the Upper Jurassic of northeastern Thailand. Tropical Natural History 24:84-95