The Lower Cretaceous Spinney Hill Member is a sandstone facies developed within the lower beds of the Joli Fou Formation in west central Saskatchewan. The member is composed of interbedded marine shales and fine grained, well sorted glauconitic sandstones, and has a maximum thickness of 110 feet. It has a tongue-like pattern and represents the offshort, marine phase of deltaic sedimentation. Source of the Spinney Hill sands was the Precambrian Shield, north and east of the area that the member now occupies.

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