粉砂岩 Traditional form: 粉砂岩 Pinyin (reading): fěnshāyán Definitions: siltstone Characters: 粉 - powder, flour, cosmetic powder; plaster 砂 - sand, pebbles, gravel; gritty 岩 - cliff; rocks; mountain Traditional characters: 粉 - powder, flour, cosmetic powder; plaster 砂 - sand, pebbles, gravel; gritty 岩 - cliff; rocks; mountain