Plate A -

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Typical appearance of slate in ppl parallel to the slaty cleavage showing uniform very fine grained texture throughout. (ppl x 40, fov 3.75mm)


 

Plate C -

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Typical appearance of slate perpendicular to the slaty cleavage showing a very well defined slaty cleavage with minimal cleavage spacing. (ppl x 40 fov 3.75mm)

Plate B -

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As plate a except in xpl, showing typical texture and composition - predominately quartz (white/grey), mica (coloured) and chlorite (dark grey) with minor opaque material. Presence of larger sized 'porphyroblast (ore mineral/quartz).(xpl x 40, fov 3.75mm)

Plate D -

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As above in xpl showing parallel alignment of flaky minerals such as mica and chlorite, but also quartz. (xpl x 40, fov 3.57mm)