 |
| |||
| bituminous sand; tar sand | |||
| oil sand | |||
| |||
| tar sand; tar sand A sandstone in which hydrocarbons have been trapped; the lighter compounds evaporate, leaving a residue of asphalt in the rock pores | |||
|
| |||
| bituminous sand; tar sand | |||
| oil sand | |||
| |||
| tar sand; tar sand A sandstone in which hydrocarbons have been trapped; the lighter compounds evaporate, leaving a residue of asphalt in the rock pores | |||
