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Phra Wihan Formation
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Phra Wihan Formation : ウィキペディア英語版
Phra Wihan Formation

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.〔Suteetorn and Jarnyahran (1986). "Geological Map of Thailand." Sheet NE 48-14 1:250,000.〕〔Racey and Goodall (2009). "Late Palaeozoic and Mesozoic Ecosystems in SE Asia". Geological Society. London. Special Publication 315 Pp 69-84.〕
Sauropod (fossil) tracks have been recorded from this formation.〔Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.〕
==See also==

* List of dinosaur-bearing rock formations
*
* List of stratigraphic units with sauropodomorph tracks
*
*
* Sauropod tracks

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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