The main coal seams occur in the Lower Cretaceous Upper Gething Formation (Bullhead Group) interbedded with sandstone, shale, siltstone and minor conglomerate. One of the seams is 2 metres thick. No seams thicker than 1.5 metres were found in the Lower Gething Formation and most were one metre thick or less.

Coal also occurs in the Lower Cretaceous Gates Formation (Fort St. John Group), however the small erosional slice does not contain enough coal to constitute a significant reserve. Two coal seams approximately 1 metre thick were found in the Juro-Cretaceous Upper Minnes Group.

The structure consists of a series of nine northwest trending and northwest plunging folds. The main fold being the Reesor syncline is located close to the centre of the property. Two north west trending, southwest dipping thrust faults cut the strata north and south of the Reesor syncline.