| Llyn Gwernan | |
|---|---|
 View of Llyn Gwernan | |
  Llyn Gwernan | |
| Location | Wales |
| Coordinates | 52°43′32″N3°55′17″W / 52.72556°N 3.92139°W |
| Basin countries | United Kingdom |
| Surface area | 3 ha (7.4 acres) |
| Settlements | Dolgellau |
Llyn Gwernan is a lake in Gwynedd, Wales and an important geological site, notable for an unusual thickness of Devensian Late-glacial organic deposits. [1]