This book is based on the script of a lecture course in isotope geochemistry, which is given at the University of Strasbourg, France and at the Eidgen6ssische Tech nische Hochschule (ETH), Zurich, Switzerland by Peter Stille. It is intended to be read by geologists, hydrologists, geochemists and any researchers and students from the broad fieldof environmental science. Its purpose is to enable readers to venture safely into the often mirky realms of radiogenic isotope geochemistry' applied to sedimentary and aquatic systems. The authors have strived to construct the book in such a way that it can be read and understood by those readers, especially students, who have no background in geochemistry. 7 chapters.take the reader through the rock cycle from weathering on the continent to eventual deposition in the sea, looked at largely from the perspective of radiogenic isotope geochemistry. <...>