سنگ لای
ماسه سنگ ریزدانه
فورش سنگ
سنگ لای
a fine-grained sandstone of consolidated silt(n)
Synonyms: siltstone
Hypernyms: sandstone
Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt. It is a form of mudrock with a low clay mineral content, which can be distinguished from shale by its lack of fissility.