Contact metamorphic rocks form when rocks are heated to high temperatures, usually at low pressure.
The effects of contact metamorphism usually only extend for a short distance from the cooling igneous rock that is providing the heat.
∗ Granite intruding clastic sedimentary rock
This 3D model from Picanninny Point in northeast Tasmania shows a contact where granitic magma has intruded into sedimentary rocks and solidified.
The granite rock is the light-coloured material and the sedimentary rock is the dark material. The heat from the granite has "cooked" the surrounding rock and the original sedimentary layers are no longer visible. There are thin veins in this rock that are composed of material that was melted by the granite.
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