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This third volume in the IAS Reprint Series reviews some of the major contributions that have been made over the last twenty years to our understanding of deep water environments. Few groups of rocks have received as much attention in recent years as deep sea sands and yet retained so many unsolved problems – How far and how fast can sediment debris flows travel? Do the many ancient series that have been interpreted as submarine fan deposits bear any resemblance to present day deep sea flows? How valid are the sequences described as coarsening upward or fining upward, and how should they be interpreted? This timely review of contributions made to this area of study since 1970 reflects the heightened interest that has surrounded it. Deep Water Turbidite Systems contains 22 papers (reproduced in full) and 22 abstracts of papers that have appeared in the journal Sedimentology, concerned with the broad spectrum of topics within the field of turbidites and associated deep water systems. If you are a member of the International Association of Sedimentologists, for purchasing details, please see: http://www.iasnet.org/publications/details.asp?code=RP3

Calcretes are an important component of many ancient fluvial, lacustrine and shallow-marine carbonate sequences, and they are widely developed in many parts of the world at the present time. Calcretes are useful to the earth scientist involved in reconstructing ancient environments, palaeoclimates and palaeographics, and they may also reveal details of soil biota and chemistry. Over the last two decades the journal Sedimentology has published a number of articles on this subject and a compilation of them is presented here. In addition to the five main sections, this volume also includes an introduction to the subject that offers a review of recent work on calcretes. The collection of papers illustrates the range of calcrete occurrences and the great variety of textures and fabrics. This volume is authored and edited by experts and will serve as more than an introduction to the subject for geologists, soil scientists and geographers. If you are a member of the International Association of Sedimentologists, for purchasing details, please see: http://www.iasnet.org/publications/details.asp?code=RP2

The only book series to summarize the latest progress on organic reaction mechanisms, Organic Reaction Mechanisms, 1973 surveys the development in understanding of the main classes of organic reaction mechanisms reported in the primary scientific literature in 1973. The 9th annual volume in this highly successful series highlights mechanisms of stereo-specific reactions. Reviews are compiled by a team of experienced editors and authors, allowing advanced undergraduates, graduate students, postdocs, and chemists to rely on the volume's continuing quality of selection and presentation.