. "stable"@en . . . "Silicate-siltstone - A type of silicate-mudstone. In the Rock Classification Scheme, it is a silicate-mudstone consisting of less than 50% clay-grade particles. Typically, abundant silt is visible with a hand lens. British Geological Survey Research Report RR/99/03, section 2.3 and table 1."@en . "Silicate-siltstone"@en . . "SISLST"@en . . "Silicate-siltstone"@en .