Bank run sand - the other type - contains small pebbles that sometimes make laying brick troublesome.
This is because sand, like all powders and granular solids, contains a lot of air space in between individual grains.
This region, he reports, is a sandy desert, and the sand there contains a wealth of fine gold dust.
The sands contain animals that lived in both estuaries and freshwater.
The sand often contains kaolinized feldspar, making it an arkose.
Imported sand may contain material toxic to local species.
On average, the sand contains 90-95% quartz and 5-10% mixed rock grains.
Clay and sand, which lie in the topmost layer, may contain petroleum.
The sands range from medium fine to coarse and contain a large proportion of shell grit.
When examined closely the sand of these beaches contains large amounts of broken glass.
