Atlas of Tropical Carbonates by Méndez Dot, José A.; Méndez Baamonde, José;

Hosszú leírás:

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This book is based on more than 40 years of research in the area of carbonate sediments and rocks of different geological ages in Venezuela. It includes examples from the Permian age (more than 270 million years ago) to the Quaternary environments belonging to modern ecosystems located on the southeast and northeast margins of the Caribbean Sea.

It focuses on the description, mainly petrographic, of carbonate sediments and rocks in continental Venezuela, and its modern carbonate systems, both in the Caribbean reef islands and archipelagos and the Atlantic continental shelve and slope. This includes the age, type of sedimentary environments (both present and the past), facies and microfacies, texture and fabric, identification and description of skeletal and non-skeletal grains (e.g. foraminifera and ooids, respectively), and other constituents (e.g., micrite, dolomite crystals, cements). It also covers porosity types and their primary or secondary origin, diagenetic processes, and some of the most significant non-carbonate minerals common in carbonate rocks (e.g., phosphate, pyrite, glauconite). Furthermore, it offers exceptional examples of petroleum source rocks (Cretaceous black shales) and carbonate reservoirs (of Cretaceous, Oligocene and Miocene ages), with over 650 photographs (panoramic and close up on kilometer, meter and centimeter scales) and photomicrographs taken with a polarized microscope (on millimeter and micrometer scales).

This book, consisting of 23 chapters, is not only an atlas of tropical carbonates of Venezuela. The first two chapters comprise an updated review of the geology of Venezuela (from Late Paleozoic to Present) and its petroliferous basins. Furthermore, each photographic chapter is preceded by an introduction. These documents, in which both generalities and specifications about the main subject matter are discussed, have been written with the intention of being general references for carbonate rocks and sediments (not only for carbonate facies of Venezuela). In addition, in the supplementary material (Appendix I and II) the authors develop the concepts of Marine Carbonate Factories, Grain Associations, and Calcite-Aragonite Seas, and place emphasis on how they apply those concepts to ancient and modern carbonate facies of Venezuela.

The authors have intended this book for professors, researchers, and graduated students in the area of Geosciences, especially Geology and Geochemistry, and whose investigations are focused on carbonate sedimentology and stratigraphy. It is also a valuable resource for oil industry professionals, as well as biologists and ecologists who are interested in the study of modern coral reefs.

Tartalomjegyzék:

Quaternary environments.- Carbonate rocks classification.- Calcareous algae.- Foraminifiers.- Oncoids.- Bryozoans.- Brachiopods.- Molluks.- Corals.- Sponges.- Echinoderms.- Ostracodes, Barnacles and Trilobites.- Ooids.- Pellets and Peloids.- Intraclasts and aggregates.- Annelids and Polychaetes.- Dolomite.- Diagenesis and Cementation.- Porosity.- Fractures, Compaction and Stylolites.- Authigenic Minerals.