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igneous rock

Igneous Rock  
Part of the National cirriculum

basalt close-up - Click to enlarge
basalt formations at Vik, Iceland - Click to enlarge
granite - Click to enlarge
lava fountain - Click to enlarge
olivine gabbro close-up - Click to enlarge
Click images to enlarge

Rock formed from the cooling and solidification of molten rock called magma. The acidic nature of this rock type means that areas with underlying igneous rock are particularly susceptible to the effects of acid rain. Igneous rocks that crystallize slowly from magma below the Earth's surface have large crystals. Examples include dolerite and granite.

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