| Haslam Formation | |
| Type: | Formation |
| Age: | Cretaceous |
| Namedfor: | Haslam Creek |
| Region: | Vancouver Island |
| Country: | Canada |
| Unitof: | Nanaimo Group |
| Underlies: | Extension Formation |
| Overlies: | Comox Formation |
| Area: | SE margin of Vancouver Island and Gulf Islands |
The Haslam Formation is a black shale geologic formation exposed on Vancouver Island and the Gulf Islands, British Columbia, Canada. It preserves primarily marine fossils dating back to the Santonian Epoch of the Cretaceous period.