Styles of Folding: Mechanics and Mechanisms of Folding of Natural Elastic Materials, Developments in Geotectonics 11, provides an introduction to theoretical underpinnings of folds in rocks. The book begins with a review of studies which have been most significant to the development of current understanding of folds. It then turns to the development of a theory of folding of multilayered elastic materials. It presents the derivation of linearized equations that describe the incremental deformation of materials with memory; these equations are then used to solve for wavelengths of sinusoidal folds in single layers and multilayers. A theory of kink folding in elastic multilayers is introduced based on the mechanism of plastic yielding between layers. The chapters also include analyses of folds in the Carmel Formation at Arches National Monument in Utah; asymmetric folds in interbedded cherts and shales of the Franciscan Complex; and some folds in Tertiary rocks in the Coast Ranges of California. Finally, the most important mechanisms of folding recognized thus far are summarized for multilayered materials with a wide range of properties.