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Deposit of loose sand or partially consolidated sandstone that is saturated with highly viscous bitumen. Oil recovered from tar sands, commonly referred to as synthetic crude, is a potentially significant form of fossil fuel. The largest known deposits of tar sands occur in Canada's Athabasca River valley, where commercial projects for synthetic oil production from tar sands are being carried out.
Variants of TAR SAND
tar sand or bituminous sand
This entry comes from Encyclopædia Britannica Concise. For the full entry on tar sand, visit Britannica.com.