Phra Wihan Formation

Phra Wihan Formation
Stratigraphic range: Early Cretaceous
Type Geological formation
Unit of Korat Group
Underlies Sao Khua Formation
Overlies Phu Kradung Formation
Thickness ~150m
Lithology
Primary Sandstone
Other Shale
Location
Region Northeast Thailand (Khorat Basin)
Country Thailand
Type section
Named for Named after Khao Phra Wihan, an 11th-century Khmer Temple in the area, where this Formation is well exposed. (See, Khao Phra Wihan National Park)

The Early Cretaceous Phra Wihan Formation is the second lowest member of the Mesozoic Korat 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-Barremian in age based on recent palynology evidence.[1][2]

Sauropod (fossil) tracks have been recorded from this formation.[3]

See also

Footnotes

  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. ↑ Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.

References