| Casma Group | |
|---|---|
| Stratigraphic range: Albian-Cenomanian | |
| Type | Geological group |
| Lithology | |
| Primary | Limestone, marl, sandstone, conglomerate |
| Other | Gypsum, tuff |
| Location | |
| Coordinates | 10°54′S 76°48′W / 10.9°S 76.8°W |
| Region | Casma Province, Ancash Region |
| Country |  Peru |
| Extent | West Peruvian Basin |
| Type section | |
| Named for | Casma |
  Casma Group (Peru) | |
The Casma Group (Spanish: Grupo Casma) is a stratigraphic group of Cretaceous (Albian to Cenomanian) sedimentary formations exposed along the coast and within the Cordillera Occidental near Casma, Peru.