The Seeley Lake coal occurrence is located approximately 5 kilometres southwest of South Hazelton.

Up to 6 coal seams have been identified in the Lower Cretaceous Red Rose Formation (Skeena Group) interbedded with mudstone and sandstone. The coal is anthracite to meta-anthracite and occurs in seams up to 1.5 metres thick. Aggregate intervals, including mudstone partings, can be up to 12 metres thick. The coal is thought to be limnic in origin, having formed in freshwater swamps and channels. The seams are therefore likely to vary considerably in thickness and lateral extent. The high rank is due to thermal metamorphism by a granitic intrusion in close proximity to the area.

The structure in the area consists of a number of northeast trending folds with strata dipping up to approximately 65 degrees. Southeast and northwest a number of major north northwest trending faults occur to the southeast and east of the licence area.