Summaries of the major features of the geology of North America and the adjacent oceanic regions are presented in 20 chapters. Topics covered include concise reviews of current thinking about Precambrian basement, Phanerozoic orogens, cratonic basins, passive-margin geology of the Atlantic and Gulf Coast regions, marine and terrestrial geology of the Caribbean region and economic geology.

Sixty years ago the Louisiana Geological Survey published "Rock Salt. Its Origin. Geological Occurrences and Economic Importance in the' State of Louisiana, Together with Brief Notes and References to All Known Salt Deposits and Industries of the World" (Bull., 7, 1908, 259 pp.) by G. D. Harris, assisted by G. D. Maury and L. Reineke. The volume which follows is an equally ambitious project, carved out as a labor of love by Stanley J. Lefond, who began the work when he was a geologist with Diamond Alkali Company, Cleve land, Ohio, and finished it when he was a member of the geology staff of United States Borax & Chemical Corp., Los Angeles. Mr. Lefond has done a thorough job, taking full advantage of the discoveries (due in large part to exploration of the subsurface in the search for oil), expanded governmental coverage of mineral deposits, and improved communications, since 1908. The motivation for "The Handbook of World Salt Resources" was the First Symposium on Salt, held in Cleveland in May, 1962, which was sponsored and organized by the relatively young and dynamic Northern Ohio Geological Society. The user of this valuable compilation owes a debt of gratitude to that Society, to the Diamond Alkali Company which donated countless hours of Mr. Lefond's time, and above all, to author Stanley Lefond.

Dynamical Geology of Salt and Related Structures deals with many aspects of the dynamical evolution of salt bodies in sedimentary basins. This book consists of four major sections. Section A deals with salt dynamics and the motion of salt. The impact of a mobile salt mass on the structural development of the overlying formations is considered in Section B, while the development of caprock, which is commonly found overlying salt diapirs, is emphasized in Section C. The last section deliberates the interrelationships between fluid flow, salt dissolution, and heat flow in the vicinity of a salt diapir, including the connections with maturation of source rocks, migration, and trapping of hydrocarbons in salt-related structures. This publication is valuable to professional geoscientists interested in processes involved in salt dynamics.