Studies of the Jurassic period are greatly helped by the high degree of stratigraphic control provided by the ubiquitous ammonites. Although this work, originally publisjed in 1975, is not a study of stratigraphy as such, a short chapter on this topic is included to provide a framework for environmental interpretation. The main goal of this book is to review in detail the advances which existed at the time in the interpretation of Jurassic facies...