When faced with a scientific problem, researchers usually draw on both existing pertinent knowledge as well as collecting new data in order to construct an answer. Geological prior information is the term used to describe all previously existing knowledge of a geological nature. Examples of such information include field interpretations, process models, expert judgments and common assumptions, together with the uncertainties associated with each. Geological prior information represents a new and emerging field within the geosciences, where methods and applications are still in their infancy. This volume presents many novel methods that seek to harness prior information in the most effective way in order to solve practical and theoretical geoscientific problems. As such, methods in this volume are concerned both with the field of geology per se, as well as its interface with the wider practical and scientific community."