has quality composed primarily of clay silt sand particulate environmental material colloidal suspension hydrogel quicksand 2019-03-02T13:00:27Z 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. Particulate environmental material which 1) is primarily composed of a fine, granular material such as sand, silt, or clay suspended in and saturated by water and 2) readily liquefies when weight is applied, losing strength and permitting objects to sink until their weight and buoyancy offset the weight of the displaced quicksand. porous unstructured