| Croisaphuill Formation | |
|---|---|
| Stratigraphic range: Ordovician (Tulean) ~ | |
| Type | Formation |
| Unit of | Durness Group |
| Lithology | |
| Primary | Limestone |
| Other | Chert |
| Location | |
| Region | Scotland |
| Country |  United Kingdom |
The Croisaphuill Formation is a geologic formation in Scotland. It preserves fossils dating back to the Ordovician period.