Quaternary geology and bedrock subcrop of the Cold Lake to Ft. McMurray area, Alberta - Surface structure, Empress Fm. Unit 1 sand and gravel - (1:250,000 scale gridded data)

A digital grid of the top of the Empress Fm. Unit 1 sand and gravel, (the lowermost unit in the Empress Formation), where present, or the topography of the surrounding landscape, where Unit 1 is absent. The unit is originally modeled from borehole data and adjusted to the bedrock surface and present-day land surface. The grid is generated at a 250 m cell-size resolution, based on information as recent as 2003.