| Croisaphuill Formation | |
| Type: | Formation |
| Age: | Ordovician (Tulean) ~ |
| Period: | Floian |
| Prilithology: | Limestone |
| Otherlithology: | Chert |
| Region: | Scotland |
| Unitof: | Durness Group |
The Croisaphuill Formation is a geologic formation in Scotland. It preserves fossils dating back to the Ordovician period.