has part has part has_part bearer of has characteristic derives from derives from particle of sand rock sand SWEETRealm:Sand LTER:484 Do not oversimplify the particulate environmental material subclasses with design patterns or similar. The materials have properties that their components do not - write full definitions including these where possible. EcoLexicon:sand https://en.wikipedia.org/wiki/Sand Particulate environmental material which is composed primarily of particles of sand with only minor proportions of other substances. This definition is intentionally ambiguous to support the multiple thresholds set by different authorities. Some authorities consider as sands soil material that contains 85% or more sand; the percentage of silt plus 1.5 times the percentage of clay does not exceed 15. coarse sand (sable grossier) 25% or more very coarse and coarse sand, and less than 50% any other one grade of sand. particulate environmental material organism obsolete organism organism texture porous granular shell