| Subject | English | Catalan |
| environ. | sand dune An accumulation of loose sand heaped up by the wind, commonly found along low-lying seashores above high-tide level, more rarely on the border of large lakes or river valleys, as well as in various desert regions, where there is abundant dry surface sand during some part of the year | duna de sorra |
| environ. | sand dune fixation Stabilization of dunes effected by the planting of marram grass (Ammophila arenaria), or rice grass, whose long roots bind the surface layers of sand and so hinder its removal by wind. A larger scale method of dealing with the same problem is by afforestation | estabilització de dunes |
| environ. | sand extraction The extraction of sand by mining for building purposes and for the extraction of heavy minerals such as rutile and zircon | extracció d'arena, de sorra |
| environ. | sand flat A sandy tidal flat barren of vegetation. A tidal flat is an extensive, nearly horizontal, marshy or barren tract of land that is alternately covered and uncovered by the tide, and consisting of unconsolidated sediment (mostly mud and sand). It may form the top surface of a deltaic deposit | arena, sorra plana |
| environ. | sand pit A place where sand is extracted from the ground | arenal, sorral |
| 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 |
