This text investigates the classification, mineralogical composition, and geological distribution of igneous rock formations across Australia and the territories of Papua and New Guinea. Germaine A. Joplin, a distinguished petrologist, synthesizes decades of field observations and laboratory analysis to provide a systematic framework for identifying igneous suites. The work serves as a foundational reference for understanding the complex volcanic and plutonic history of the Australasian region through rigorous descriptive analysis.

This volume is regarded as a standard technical reference for geologists and students specializing in the igneous petrology of the Australian continent. Its systematic approach and detailed documentation provide a reliable resource for researchers conducting field studies or laboratory analysis in this geographic region.