Kallamedu Formation
| Kallamedu Formation | |
|---|---|
| Stratigraphic range: Maastrichtian to Danian ~ | |
| Type | Geological formation |
| Unit of | Ariyalur Group |
| Underlies | Niniyur Formation |
| Overlies | Archean Basement |
| Thickness | Variable, typically 5–5,000 km (3.1–3,106.9 mi) |
| Lithology | |
| Primary | Claystone, siltstone limestone |
| Other | Conglomerate |
| Location | |
| Coordinates | 11°41′46″N 79°24′46″E / 11.6962°N 79.4127°E |
| Country | India |
| Extent | Kallamedu |
| Type section | |
| Named for | Kallamedu village |
The Kallamedu Formation is a Late Cretaceous (Maastrichtian) geologic formation located in the Ariyalur district of Tamil Nadu, India that forms part of the Ariyalur Group. It dates to the Maastrichtian of the Late Cretaceous. Dinosaur remains and petrified wood samples are among the known fossils recovered from this formation.