Types of Igneous Intrusions:

-Sills Form when igneous rocks form in between rock layers.

-Plutons are any igneous rock that forms underground.

-Dikes are igneous intrusions that cut across rock layers.

-Laccoliths are mushroom shaped igneous intrusion.

-Batholiths are huge igneous intrusions of unknown size

-Stocks are small batholiths

-Necks are the remnents of hardened lava in the troat that become visible after erosion