Arenaceous

[Sarah]

Sandy or consisting largely of sand; of the nature of sand;easily disintegrating into sand; friable; as, arenaceous limestone.

[Tariq Zaki]

[Sandy]; sandlike
Resembling or containing or abounding or [growing] in [sand]

[Jason Yan]

Consisting of sand or particles of a substance similar to sand.

[Magaret]

(of rock) made of sand or particles (= small pieces) similar to sand: