Thickness ~150m | Unit of Korat Group Other Shale | |
Region Northeast Thailand (Khorat Basin) | ||
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.
Sauropod (fossil) tracks have been recorded from this formation.
References
Phra Wihan Formation Wikipedia(Text) CC BY-SA