An article on oil sands
http://www.fool.com/investing/general/2008/02/22/digging-into...
From the article
Canada, in whose oily sands Suncor Energy (NYSE: SU ) , Canadian Natural Resources (NYSE: CNQ ) , and Marathon Oil (NYSE: MRO ) play, has an estimated 174 billion barrels in proven oil sands reserves, most of which are in Alberta. Its oil sands reserves alone place Canada second to only Saudi Arabia in terms of total oil reserves. And that's just the amount believed to be recoverable under current economic conditions, using current technology.