Je vous en propose plusieurs en francais et en anglais comprenant plus ou moins dinformations et parfois etayes dillustrations. An understanding of the interaction of these processes and resulting types of turbidite deposition is still in its infancy and requires, as a preliminary approach, the precise framing of turbidite. Bouma, 19322011 is a characteristic set of sedimentary structures typically preserved within positively graded sand or siltmud couplets. Permeability of a fault zone crosscutting a sequence of. Permeability of a fault zone crosscutting a sequence of sandstones and shales and its influence on hydraulic head distribution in the chatsworth formation, california, usa. Palaeogeographic setting, lithostratigraphy, and sedimentary. Emergence of highly virulent pseudorabies virus in southern china. A characteristic sequence of sedimentary structures occurring in sedimentary rocks deposited in areas of deep water sedimentation by turbidity currents, which form deposits called turbidites. The bouma sequence specifically describes the ideal vertical succession of structures deposited by lowdensity i. The bouma sequence 1962 and the resurgence of geological interest in the french maritime alps 1980s. Caracteres sedimentologiques et structuraux des depots. Dans le detail et a partir du canyon sousmarin dont proviennent les. Bouma, 19322011 describes a classic set of sedimentary structures in turbidite beds deposited by turbidity currents at the bottoms of lakes, oceans and rivers.
The bouma sequence and the turbidite mind set earthjay science. Recent processes of levee formation on the zaire deepsea fan. Les differentes etapes sont resumees dans le synoptique cidessous. In theory, a complete bouma sequence comprises sediments that fine upwards, consisting of a lowermost layer of coarse, chaotic clastic sediments deposited under conditions of high depositional energy overlain by successively finer grained and better stratified sediments like sands and muds deposited under calmer conditions that are labeled as. Sedimentation gravitaire et paleosismicite dune marge active. In theory, a complete bouma sequence comprises sediments that fine upwards, consisting of a lowermost layer of coarse, chaotic clastic sediments deposited under conditions of high. Article detrital zircon geochronology of ediacaran to cambrian deepwater. In theory, a complete bouma sequence comprises sediments that fine upwards, consisting of a lowermost layer of coarse, chaotic clastic sediments deposited under conditions of high depositional energy. The kozak consensus sequence kozak consensus or kozak sequence is a nucleic acid motif that functions as the protein translation initiation site in most eukaryotic mrna transcripts. Regarded as the optimum sequence for initiating translation in eukaryotes, the sequence is an integral aspect of protein regulation and overall cellular health.