| Langara Formation | |
| Type: | Formation |
| Age: | Katian-Hirnantian (Rawtheyan) ~ |
| Period: | Hirnantian |
| Prilithology: | Limestone |
| Otherlithology: | Siltstone, shale |
| Region: | Baerum, Oslo Asker |
The Langara Formation is a geologic formation in Norway. It preserves fossils dating back to the Katian to Hirnantian (Rawtheyan) stages of the Ordovician period.