Igneous Rocks

Crystaline (1 mark)

Size and formation

Coarse 5mm+ are formed deep in planet

Medium 1-5mm Sill/Dyke (intrusions)

Fine<1mm Lava Flows

Euhedral

Subhedral

Anhedral

Glassy-Super cooling (volcanic glass).(lava pours into water)

ALWAYS- CRYSATLINE

Equigranular or Porphytic

Vesicles(formed by gas bubbles escaping)