"TUFIST"@en . "Tuffisite"@en . "Tuffisite"@en . . . "stable"@en . . "Tuffisite - A type of intrusion-breccia. It comprises brecciated and lithified country-rock fragments found in intrusive pipes which are formed by the explosive release of gas. British Geological Survey Research Report RR/99/06, section 8.2."@en . .