Geological Society of London Handbook Series Edited by Keith Cox Founded in 1807, the Geological Society of London has been publishing since 1845 and now distributes its journal to Fellows throughout the world. This handbook is published as part of a series of authoritative practical guides to field geology. The Field Description of Igneous Rocks Written to complement textbooks on igneous petrology, this handbook equips the student with all the information required to study igneous rocks in the field. It deals with observations from the scale of hand specimens and outcrops to regional mapping of field relationships. Igneous rocks range from volcanic rocks erupted at the Earth's surface to plutonic rocks which crystallised at depth within the Earth,and the techniques to study these differ from those used for the field study in other volumes in this series. '.its genuine "handbook" size, flexible cover and realistic price should make it an affordable part of field equipment for all geology students.' R. A. Howie, Mineralogical Magazine