
The diagram shows the structure of a cliff face with some details about each layer of rock.
(v) composed of orange coloured grains and ripple marks
(s) cemented remains of coral and shells of other organisms
(e) tiny crystals of hard dense rock, signs of previous melting
(n) layers of interlocking crystals with evidence of heating, recrystallisation with no melting
(r) hard rock, mixture of larger crystals of different colours
Which rock layer(s) is/are most likely to be igneous rocks? [gs-129]