- GeoRef, Copyright 2004, American Geological Institute. Reference includes data from Bibliography and Index of Geology Exclusive of North America, Geological Society of America, Boulder, CO, United States
Discusses and deplores the use of the term "magma-type" in such a way as to distort its original meaning, namely, similar composition. The term "comagmatic" is similarly misused. The need for petrologic terms to be descriptive and free from petrogenetic implications is pointed out.