| Kojarena Sandstone | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Champion Bay Group |
| Underlies | Yarragadee Formation |
| Overlies | Newmarracarra Limestone |
| Thickness | Up to 34 m (112 ft) |
| Lithology | |
| Primary | Sandstone |
| Other | Claystone |
| Location | |
| Region | Western Australia |
| Country |  Australia |
| Extent | Perth Basin |
The Kojarena Sandstone is a Middle Jurassic geologic formation from Australia. It consists of red-brown, medium- to coarse-grained ferruginous sandstone, with a basal claystone.