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Athabasca oil sands 
an extensive sand formation along the Athabasca River impregnated with petroleum oil and tar.
See also: Alberta tar sands
- 1958 This area's big ace-in-the-hole is the fantastic Athabasca oil sands, and McMurray is right in the heart of them. Comprising the world's largest known reserve of crude oil, the black, sticky sands contain an estimated 300 billion barrels waiting to be exploited.
- 1958 This area's big ace-in-the-hole is the fantastic Athabasca oil sands, and McMurray is right in the heart of them. Comprising the world's largest known reserve of crude oil, the black, sticky sands contain an estimated 300 billion barrels waiting to be exploited.