Sao Khua Formation

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Sao Khua Formation
Stratigraphic range: Barremian
~129–125 Ma
↓
TypeGeological formation
Unit ofKhorat Group
UnderliesPhu Phan Formation
OverliesPhra Wihan Formation
Thickness~120 m (390 ft)
Lithology
PrimarySandstone, conglomerate
OtherSiltstone, claystone
Location
Coordinates16°42′N 102°18′E / 16.7°N 102.3°E / 16.7; 102.3Coordinates: 16°42′N 102°18′E / 16.7°N 102.3°E / 16.7; 102.3
Approximate paleocoordinates14°18′N 112°24′E / 14.3°N 112.4°E / 14.3; 112.4
RegionIndochina
Country Thailand
ExtentKhorat Plateau
Type section
Named byWard & Bunnag
Year defined1964
Sao Khua Formation is located in Thailand
Sao Khua Formation
Sao Khua Formation (Thailand)

The Sao Khua Formation is a middle member of the Khorat Group. It consists of an alteration of pale red to yellowish-gray, fine to medium-grained sandstone and grayish-reddish brown siltstone and clay. Rare pale red to light gray conglomerates, containing carbonate pebbles, are also characteristic of this formation. This geological formation in Thailand, dates to the Early Cretaceous age.

Dinosaur remains are among the fossils that have been recovered from the formation.[1]

Vertebrate paleofauna[]

Dinosaurs[]

  • Siamosaurus - spinosaurid theropod, described in 1986 - "Isolated teeth."[2] - Spinosauridae incertae sedis
  • Siamotyrannus - metriacanthosaurid[3] theropod, described in 1996 - "Pelvis, dorsal, sacral, and caudal vertebrae."[4]
  • Phuwiangosaurus - titanosaurian sauropod, described in 1994 - "Partial skeletons, juvenile - adult."[5]
  • Kinnareemimus - ornithomimosaurian theropod, described in 2009
  • Phuwiangvenator - megaraptoran theropod, described in 2019[3]
  • Vayuraptor - ?megaraptoran theropod, described in 2019[3]
  • Theropoda indet. (= compsognathid indet.)
  • Sauropoda indet. 1 and 2

Lizards[]

  • Anguimorpha indet.[6]

See also[]

  • List of dinosaur-bearing rock formations

References[]

  1. ^ 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.
  2. ^ "Table 4.1," in Weishampel, et al. (2004). Page 78.
  3. ^ a b c Adun Samathi; Phornphen Chanthasit; P. Martin Sander (2019). "Two new basal coelurosaurian theropod dinosaurs from the Lower Cretaceous Sao Khua Formation of Thailand". Acta Palaeontologica Polonica. 64. doi:10.4202/app.00540.2018.
  4. ^ "Table 4.1," in Weishampel, et al. (2004). Page 74.
  5. ^ "Table 13.1," in Weishampel, et al. (2004). Page 268.
  6. ^ Fernandez, Vincent; Buffetaut, Eric; Suteethorn, Varavudh; Rage, Jean-Claude; Tafforeau, Paul; Kundrát, Martin (2015-07-15). "Evidence of Egg Diversity in Squamate Evolution from Cretaceous Anguimorph Embryos". PLOS ONE. 10 (7): e0128610. doi:10.1371/journal.pone.0128610. ISSN 1932-6203. PMC 4503689. PMID 26176757.
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