The structure of salt domes and salt anticlines in the three American salt dome provinces, Gulf Coast, Isthmus of Tehuantepec, and Utah-Colorado, is the theme of this paper. The cycle of salt deposition, salt dome formation, growth, and ablation, is treated in the stages of youth, maturity, and old age. Under youth are described the effect of domal growth on peripheral sediments and the growth of anhydrite cap rocks; under maturity the mechanics of salt dome piercement, thickness of the original source bed of salt, symmetry of domes and of overlying and flanking sedimentary rocks; and under old age the formation of cap rocks, structure of adjacent sedimentary rocks, nature of water sands, and of oil reservoirs.
Figures & Tables
The AAPG volumes of Structure of Typical American Oil Fields preceed this book, which was written as a sequel to those, and at first conceived as a third volume of the earlier work. This book is designed to review, modify and, if possible, clarify ideas with regard to the fundamental concepts of oil geology, utilizing, for this purpose, the material presented in the two earlier data-based volumes. To conform to the original standard set for it, this book has been kept relatively free from factual data and has been compiled rather as a summation, based upon the best available evidence, of present knowledge of the science. This volume does not include a discussion of the technique of field or laboratory geology, but does include papers divided into 7 parts: History; Origin and evolution of petroleum; Migration and accumulation of petroleum; Relations of petroleum accumulation to structure; Porosity, permeability, compaction; Oil-field waters; and Subsurface temperature gradients.