Talk:Tony Sampson/@comment-26948022-20150908225525/@comment-3242362-20150908232144

Sands from which oil can be harvested; basically, instead of pumping liquid from the ground (traditional harvesting) it is harvested, as sludge, from various oil-drenched sandy areas (most of them in Canada). Like shale oil, it's a new-ish development in terms of getting black gold.