Before revision: This type of lithified rock , different from yellow tuff, takes on a particular texture characterised by the orientation of lenticular concentrations of grey colour, called flames, immersed in a matrix of the same colour but lighter.
After revision: This type of ignimbrite tuffNaples , different from yellow tuff, takes on a particular texture characterised by the orientation of lenticular concentrations of grey colour, called flames, immersed in a matrix of the same colour but lighter.