Khok Kruat Formation
The Khok Kruat Formation (Thai: หมวดหินโคกกรวด) is a rock formation found in northeastern Thailand. It is the uppermost formation of the Khorat Group. It is dated to the Aptian stage of the Early Cretaceous period, and is notable for its fossils of dinosaurs. It is equivalent to the Gres superieurs Formation of Laos. The group is a fluvial formation consisting primarily of red siltstones and sandstones.
| Khok Kruat Formation | |
|---|---|
| Stratigraphic range: Aptian ~ | |
| Type | Geological formation |
| Unit of | Khorat Group |
| Underlies | Maha Sarakham Formation |
| Overlies | Phu Phan Formation |
| Lithology | |
| Primary | Sandstone, siltstone |
| Other | Conglomerate, shale |
| Location | |
| Coordinates | 15.9°N 102.0°E |
| Approximate paleocoordinates | 16.3°N 105.3°E |
| Region | Indochina |
| Country | Thailand |
| Extent | Khorat Plateau |
| Type section | |
| Named by | Ward & Bunnag |
| Year defined | 1964 |
Khok Kruat Formation (Thailand) | |
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