 |
| arena, sorra asfàltica | |
| environ. | tar sand A sandstone in which hydrocarbons have been trapped; the lighter compounds evaporate, leaving a residue of asphalt in the rock pores |
|
| arena, sorra asfàltica | |
| environ. | tar sand A sandstone in which hydrocarbons have been trapped; the lighter compounds evaporate, leaving a residue of asphalt in the rock pores |