This book is aimed at the level of advanced undergraduate and graduate courses in sedimentation, sedimentary petrology, or general petrology (it may also be helpful to teachers of such courses). Although the book focuses on sandstones it contains much which will be of interest to students of all sediments. It should also provide a useful reference work for the professional geologist, especially those concerned with petroleum, ground-water, and economic geology either in industry or government. Because the subject is so closely tied to surface processes it may equally be of interest to geomorphologists and engineers who deal with beaches and rivers where sand is in transit.