Igneous+Intrusions

=__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 = = =