Written by leading experts in the field, this work summarises the important aspects relating to layered intrusions, with almost universal coverage of the subject. Each chapter is a complete review of a theme or specific geological intrusion. The first part of the book covers the general principles and processes which apply to all intrusions. Those chapters on individual intrusions concentrate on factual information. A detailed full colour geological map of the Skaergaard intrusion is also included. This book will appeal to a wide audience -university libraries, research students in igneous petrology, state organisations such as exploration companies -as well as being an ideal textbook for university courses on igneous petrology, and geochemistry and petrography.