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Time series were obtained from two current meters near bottom on one mooring in Monterey Submarine Canyon. These records were analyzed to determine the general character of the currents, the volume transport at different levels above the canyon floor, the power spectral estimates of the upcanyon and cross-caynon directional components, and the coherence between directional components. Current speed variations appeared as a series of peaks occurring every 5 to 6 hr with maxima of 17 to 21 cm/sec. Current directions oscillated with a discernible period of about 12 hr. Currents 30 m above the bottom were aligned nearly along the canyon axis; currents 60 m above the bottom were nearly perpendicular to the canyon axis. The spectral analysis indicated tides as a major driving force of the deep currents, but also indicated the presence of other forcing functions, possibly internal waves, with shorter periods. The coherence between instruments was low, suggesting the possible presence of a near-bottom boundary layer, or that significant signal deterioration was caused by noise.
This book on the current state of knowledge of submarine geomorphology aims to achieve the goals of the Submarine Geomorphology working group, set up in 2013, by establishing submarine geomorphology as a field of research, disseminating its concepts and techniques among earth scientists and professionals, and encouraging students to develop their skills and knowledge in this field. Editors have invited 30 experts from around the world to contribute chapters to this book, which is divided into 4 sections – (i) Introduction & history, (ii) Data & methods, (ii) Submarine landforms & processes and (iv) Conclusions & future directions. Each chapter provides a review of a topic, establishes the state-of-the-art, identifies the key research questions that need to be addressed, and delineates a strategy on how to achieve this. Submarine geomorphology is a priority for many research institutions, government authorities and industries globally. The book is useful for undergraduate and graduate students, and professionals with limited training in this field.
This handbook is vital for understanding the origin of deep-water sandstones, emphasizing sandy-mass transport deposits (SMTDs) and bottom-current reworked sands (BCRSs) in petroleum reservoirs. This cutting-edge perspective, a pragmatic alternative to the conventional turbidite concepts, is crucial because the turbidite paradigm is built on a dubious foundation without empirical data on sandy turbidity currents in modern oceans. In the absence of evidence for sandy turbidity currents in natural environments, elegant theoretical models and experimental observations of turbidity currents are irrelevant substitutes for explaining the origin of sandy deposits as "turbidites." In documenting modern and ancient SMTDs (sandy slides, sandy slumps, and sandy debrites) and BCRSs (deposits of thermohaline [contour] currents, wind-driven currents, and tidal currents), the author describes and interprets core and outcrop (1:20 to 1:50 scale) from 35 case studies worldwide (which include 32 petroleum reservoirs), totaling more than 10,000 m in cumulative thickness, carried out during the past 36 years (1974-2010). The book dispels myths about the importance of sea level lowstand and provides much-needed clarity on the triggering of sediment failures by earthquakes, meteorite impacts, tsunamis, and cyclones with implications for the distribution of deep-water sandstone petroleum reservoirs. - Promotes pragmatic interpretation of deep-water sands using alternative possibilities - Validates the economic importance of SMTDs and BCRS in deep-water exploration and production - Rich in empirical data and timely new perspectives
What is a scientific theory? How is it different from a law or a principle? And what practical use is it? Science students, especially those new to studying the sciences, ask these questions everyday about these essential parts of a science education. To support these students, the Encyclopedia of Scientific Principles, Laws, and Principles is designed to be an easy-to-understand, accessible, and accurate description of the most famous scientific concepts, principles, laws, and theories that are known in the areas of astronomy, biology, chemistry, geology, mathematics, medicine, meteorology, and physics. The encyclopedia contributes to the scientific literacy of students and the general public by providing them with a comprehensive, but not overwhelming source of those scientific concepts, principles, laws and theories that impact every facet of their daily lives. The Encyclopedia of Scientific Principles, Laws, and Theories includes several hundred entries. For ease of use, entries are arranged alphabetically by the names of the men or women who are best-known for their discovery or development or after whom the particular scientific law or theory is named. Entries include a short biography of the main discoverers, as well as any information that was of particular relevance in the evolution of the scientific topic. The encyclopedia includes sidebars and examples of the usefulness of the theories, principles, and laws in everyday life, demonstrating that understanding these concepts have practical use. Each entry also includes resources for further research, and the encyclopedia includes a general bibliography of particularly useful primary and secondary source materials.