Naturally occurring bitumen-impregnated sands that yield mixtures of liquid hydrocarbon and that require further processing other than mechanical blending before becoming finished petroleum products
Rocks (other than coal or oil shale) that contain highly viscous hydrocarbons that are unrecoverable by primary production methods
Sedimentary deposit that consists of a mixture of clay, sand, water, and a tar-like heavy oil known as bitumen Bitumen is often extracted from tar sand by heating It is then refined to produce synthetic crude oil
A commonly used name to describe a sedimentary rock reservoir impregnated with a very heavy, viscous crude oil which cannot be produced by conventional production techniques Tar-sand infers a sandy sedimentary rock as the host, but this is not always the case as other porous rocks such as siltstone and fractured carbonates have also been classified as tar-sand
or bituminous sand 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