. . . . . . . . . "42942734"^^ . . . "1090256752"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Brisbane tuff"@en . . . . "Brisbane tuff is a type of rock, formed as a result of a volcanic eruption. As the name suggests, it is a type of tuff found in Brisbane, Queensland, Australia. It is a form of welded ignimbrite. Brisbane tuff comes in a variety of colours: pink, green, blue (grey) and purple. The different colours are due to the extent of oxidation of iron and manganese. It is often incorrectly described as porphyry."@en . . . . . . . . . . "7326"^^ . . . . . "Brisbane tuff is a type of rock, formed as a result of a volcanic eruption. As the name suggests, it is a type of tuff found in Brisbane, Queensland, Australia. It is a form of welded ignimbrite. Brisbane tuff comes in a variety of colours: pink, green, blue (grey) and purple. The different colours are due to the extent of oxidation of iron and manganese. It is often incorrectly described as porphyry."@en . . . . . . . . . . . . . . . . . . . . . . . .