| Buchanan Lake Formation | |
|---|---|
| Stratigraphic range: Lutetian | |
| Type | Formation |
| Unit of | Eureka Sound Group |
| Location | |
| Region | Axel Heiberg Island, Nunavut |
| Country | Canada |
The Buchanan Lake Formation is a geologic formation on Axel Heiberg Island in Nunavut, and part of the Eureka Sound Group. The formation is divided into four members and preserves fossils dating back to the Lutetian stage.