"Tuffaceous-siltstone"@en . . . "Tuffaceous-siltstone - A type of tuffaceous-sedimentary-rock. British Geological Survey Research Report RR/99/06, section 4.2 and fig. 4. See also: siltstone."@en . . . "TFSLST"@en . . . . "stable"@en . . "Tuffaceous-siltstone"@en .