An intrusion is an igneous rock body that forms from crystallized magma under Earth's surface.any mountain ranges, such as the Sierra Nevada in California, are formed mostly by intrusive rock, large granite (or related rock) formations. Intrusions are one of the two ways igneous rock can form; the other is extrusive, that is, a volcanic eruption or similar event.
Admit it: you were pronouncing the word âSmaugâ â the name of the Hobbit dragon, the one whoâs in the subtitle of the upcoming movie installation â as âsmog.â.
you have gandalf, you have the 2 blue wizards, the white wizard  (i forgot his name :/) and you have the brown wizard (forgot his  name too :/) Thats what gandalf says when â¦the hobbit asks him.   the blue wizard's names are Alatar and Pallando, the brown wizard  is Radagast, and the white wizard is Saruman .