Khok Kruat Formation
{{short description|Geologic formation in Thailand}}
{{Infobox rockunit
| name = Khok Kruat Formation
| image =
| caption =
| type = Geological formation
| age = Aptian
~{{fossil range|120|113}}
| period = Aptian
| prilithology = Sandstone, siltstone
| otherlithology = Conglomerate, shale
| namedfor =
| namedby = Ward & Bunnag
| year_ts = 1964
| region = Indochina
| country = {{Flag|Thailand}}
| coordinates = {{coord|15.9|N|102.0|E|display=inline,title}}
| paleocoordinates = {{coord|16.3|N|105.3|E|display=inline}}
| unitof = Khorat Group
| subunits =
| underlies = Maha Sarakham Formation
| overlies = Phu Phan Formation
| thickness =
| extent = Khorat Plateau
| area =
| map = {{Location map+ | Thailand
| relief = 1
| width = 250
| float = center
| places =
{{Location map~ | Thailand
| lat_deg = 15.9
| lon_deg = 102.0
| mark = Green pog.svg
| marksize = 12
}}
}}
| map_caption =
}}
The Khok Kruat Formation ({{Langx|th|หมวดหินโคกกรวด}}) is a rock formation found in northeastern Thailand. It is the uppermost formation of the Khorat Group.{{cite book|author=Eric Buffetaut|title=Late Palaeozoic and Mesozoic Ecosystems in SE Asia|url=https://books.google.com/books?id=6wMfMgSmckkC&pg=PA146|year=2009|publisher=Geological Society of London|isbn=978-1-86239-275-5|page=146}} 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.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}}. The group is a fluvial formation consisting primarily of red siltstones and sandstones.
Vertebrate paleofauna
{{Paleobiota-key-compact}}
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.{{Cite journal|author1=Eric Buffetaut |author2=Varavudh Suteethorn |author3=Jean Le Loeuff |author4=Sasidhorn Khansubha |author5=Haiyan Tong |author6=Kamonlak Wongko |year=2005 |title=New dinosaur species from the Upper Triassic Upper Maleri and Lower Dharmaram formations of central India |journal=International Conference on Geology, Geotechnology and Mineral Resources of Indochina (GEOINDO 2005) |pages=575–581 }} Fukuiraptor-like teeth have also been recovered from the formation.{{Cite journal|last1=Chokchaloemwong|first1=Duangsuda|last2=Azuma|first2=Yoichi|last3=Shibata|first3=Masateru|last4=Jintasakul|first4=Pratueng|date=2015|title=The Carcharodontosaurid Teeth from the Lower Cretaceous Khok Kruat Formation of Nakhon Ratchasima, Thailand|url=https://www.researchgate.net/publication/341040363|journal=2nd International Symposium on Asian Dinosaurs 2015 Bangkok}}
=Reptiles=
==Dinosaurs==
==Pseudosuchians==
==Turtles==
| class="wikitable" align="center" | ||||
| colspan="6" align="center" | Turtles reported from the Khok Kruat Formation | ||||
|---|---|---|---|---|
| Genus | Species | Location
!Material | Notes | Images |
| Kizylkumemys
|K. khoratensis | Ban Saphan Hin and Ban Khok Kruat localities, Nakhon Ratchasima province.{{Cite journal |last1=Tong |first1=Haiyan |last2=Claude |first2=Julien |last3=Suteethorn |first3=Varavudh |last4=Naksri |first4=Wilailuck |last5=Buffetaut |first5=Eric |date=May 2009 |title=Turtle assemblages of the Khorat Group (Late Jurassic-Early Cretaceous) of NE Thailand and their palaeobiogeographical significance |url=https://www.researchgate.net/publication/240675681 |journal=Geological Society, London, Special Publications |volume=315 |issue=1 |pages=141–152 |doi=10.1144/sp315.11 |bibcode=2009GSLSP.315..141T |s2cid=130709324 |issn=0305-8719}} | A carettochelyid. | | ||||
| Shachemys
|S. sp. |Ban Saphan Hin, Nakhon Ratchasima province. |An adocid, remains too fragmentary for specific assignment. | |
