Occurrence of the Cambrian trace fossil Oldhamia in southern Quebec

The Saint-Nicolas Formation (Sillery Group) of the Chaudiere nappe in southern Quebec is a succession of shale and feldspathic sandstone that was deposited in a deep water channel-fan environment. This formation, formerly regarded as unfossiliferous, has now yielded the first confirmed specimens of the trace fossil Oldhamia in Quebec. Two ichnospecies are described, O. smithi Ruedemann and O. curvata Lindholm and Casey. The occurrence of the middle-upper Lower Cambrian brachiopod Botsfordia pretiosa in the overlying Breakeyville Formation confirms that this occurrence of Oldhamia is Lower Cambrian