Batholith, The largest of all intrusions., Lacolith, A mushroom shaped intrusions that pushes the overlying strata upwards., Volcanic Pipe, Leads magma from the magma source to the surface., Dyke, A wall like intrusion that cuts almost vertically across existing strata., Sill, A horizontal intrusion formed as magma spread between layers., Lopolith, The layer underneath cannot support the weight and sinks downwards creating a saucer shaped intrusion., Magma pool, Large volume of magma intrudes between sedimentary layers.

Massive Igneous Rocks

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