Having completed the description of maps of faulted structures, the book is continued with maps of intrusive igneous structures. To do this, the chapter is introduced by a description of the geological setting of igneous rocks in the first paragraph. Because there is a large variety in shapes and sizes of these structures, these are the subject of the second paragraph. Different kind of plutons, which are bodies of intrusive igneous rocks solidified from a cooling magma, and moreover the special kind mantled gneiss-domes are discussed in the final two chapters.