Phra Wihan Formation

Phra Wihan Formation
Stratigraphic range: Berriasian-Valanginian
~145–133.6 Ma
TypeGeological formation
Unit ofKhorat Group
UnderliesSao Khua Formation
OverliesPhu Kradung Formation
Thickness150 m (490 ft)
Lithology
PrimarySandstone
OtherSiltstone, mudstone, conglomerate
Location
Coordinates16°06′N 103°54′E / 16.1°N 103.9°E / 16.1; 103.9
Approximate paleocoordinates14°18′N 111°24′E / 14.3°N 111.4°E / 14.3; 111.4
RegionNortheast Thailand (Khorat Basin)
Country Thailand
ExtentKhorat Plateau
Type section
Named forKhao Phra Wihan, an 11th-century Khmer Temple (Khao Phra Wihan National Park)
Named byWard & Bunnag
Year defined1964
Phra Wihan Formation is located in Thailand
Phra Wihan Formation
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-Valanginian in age based on palynological analysis.[1][2][3]

Sauropod (fossil) tracks have been recorded from this formation.[4]

See also

References

  1. ^ Suteetorn and Jarnyahran (1986). "Geological Map of Thailand." Sheet NE 48-14 1:250,000.
  2. ^ Racey and Goodall (2009). "Late Palaeozoic and Mesozoic Ecosystems in SE Asia". Geological Society. London. Special Publication 315 Pp 69-84.
  3. ^ Tucker, Ryan T.; Hyland, Ethan G.; Gates, Terry A.; King, M. Ryan; Roberts, Eric M.; Foley, Elliot K.; Berndt, David; Hanta, Rattanaphorn; Khansubha, Sasa-on; Aswasereelert, Wasinee; Zanno, Lindsay E. (September 2022). "Age, depositional history, and paleoclimatic setting of Early Cretaceous dinosaur assemblages from the Sao Khua Formation (Khorat Group), Thailand". Palaeogeography, Palaeoclimatology, Palaeoecology. 601: 111107. Bibcode:2022PPP...60111107T. doi:10.1016/j.palaeo.2022.111107. ISSN 0031-0182.
  4. ^ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.

Bibliography