http://wiki.answers.com/Q/What_are_foliated_and_non-foliated_rockshttp://wiki.answers.com/Q/What_are_foliated_and_non-foliated_rocks Foliation is a geologic term that is used to describe the...
Difficult to give you a precise answer, migmatites are composed of a leucosome which is new material crystallized from incipient melting and a mesosome which is old material that resisted melting....