At the Amos occurrence, two small gypsum outcrops are exposed along the east bank of the Lussier River, 2.2 kilometres north of the confluence of it and Coyote Creek. The gypsum belongs to the Devonian Burnais Formation and appears to be restricted to a very small area. Where exposed, the gypsum is pale grey, grey and pale brownish grey. It is laminated to thin-bedded with the laminae contorted and folded. Some breccia is also present. North and northeast, the gypsum is cut off by limestone and anhydrite. There is some potential present to the south.
Overburden in the area varies from 15 to 76 metres and may preclude mining of the gypsum in many localities.
Georgia Pacific Canada Inc. holds the property.