| 释义 |
tar sand
tar sandn. often tar sands A type of oil sand from which the lighter fractions of petroleum have escaped and in which only the heavier fractions forming a residual asphalt remain.tar sand n (Geological Science) a sandstone in which hydrocarbons have been trapped; the lighter compounds evaporate, leaving a residue of asphalt in the rock pores tar sand
tar sand[′tär ‚sand] (geology) A type of oil sand; a sand whose interstices are filled with asphalt that remained after the escape of the lighter fractions of crude oil. |