"Fragmental igneous rock and sediment"@en . . . "Fragmental igneous rock and sediment - Includes those rocks constituted of mixtures of fragments of rocks, crystals and glass. British Geological Survey Research Report RR/99/06, section 1.3 and fig. 1."@en . . . "+~FIS"@en . "stable"@en . . . . "Fragmental igneous rock and sediment"@en . .