粉砂石 Traditional form: 粉砂石 Pinyin (reading): fěnshāshí Definitions: siltstone Characters: 粉 - powder, flour, cosmetic powder; plaster 砂 - sand, pebbles, gravel; gritty 石 - stone, rock, mineral Traditional characters: 粉 - powder, flour, cosmetic powder; plaster 砂 - sand, pebbles, gravel; gritty 石 - stone, rock, mineral