Is siltstone a mineral or a rock?
Score: 4.8/5 (15 votes) 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.Is siltstone a mineral a rock or neither?Siltstone is a ...