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The Early Cretaceous Phu Kradung Formation is the lowest member of the Mesozoic Korat Group which outcrops in Northeast Thailand. This (geology) Formation consists of micaceous, brown to reddish-brown Siltstone beds with minor brown and grey Shale and Sandstone beds. Occasional lime-noduled conglomerate occurs.〔Suteetorn and Jarnyahran (1986). "Geological Map of Thailand 1:250,000, Sheet NE 48-14 (Roi Et).〕 The Phu Kradung Formation sediments were deposited in a lake-dominated floodplain cut by meandering and occasionally braided river channels.〔Racey and Goodall (2009). "Late Palaeozoic and Mesozoic Ecosystems in SE Asia". Geological Society. London. Special Publication 315 Pp 69-84.〕 The Phu Kradung Formation is considered, on the basis of recent vertebrae fossil discoveries, to be Late Jurassic in age. However, new palynology data suggests an age of Early Cretaceous.〔 Dinosaur remains have been recovered from this formation, although none have yet been referred to a specific genus.〔Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.〕 ==See also== * List of dinosaur-bearing rock formations * * List of stratigraphic units with indeterminate dinosaur fossils 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Phu Kradung Formation」の詳細全文を読む スポンサード リンク
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