sand

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.

http://purl.obolibrary.org/obo/ENVO_01000017

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.

https://en.wikipedia.org/wiki/Sand

EcoLexicon:sand

SWEETRealm:Sand

LTER:484

Particulate environmental material which is composed primarily of particles of sand with only minor proportions of other substances.

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.

http://purl.obolibrary.org/obo/PATO_0001759

http://purl.obolibrary.org/obo/PATO_0000984

http://purl.obolibrary.org/obo/PATO_0000150

http://purl.obolibrary.org/obo/ENVO_00000340

sand

ENVO:01000017

sand

http://purl.obolibrary.org/obo/ENVO_01000060