Phra Wihan Formation
Introduction 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.Sauropod (fossil) tracks have been recorded from this formation.
See also * List of dinosaur-bearing rock formations** List of stratigraphic units with sauropodomorph tracks*** Sauropod tracks
References === Bibliography ===*