Sediment dynamics

This module is an in-depth training course in sedimentology that includes a lecture component (classroom) and a practical component (fieldwork). After an overview of sedimentary recording mechanisms, hydrodynamic processes, and associated sedimentary features and structures, the different environments of terrigenous and carbonate detrital deposits are reviewed, sweeping across the sedimentary landscape from upstream to downstream.

Proficiency in facies sedimentology with a high level of expertise in both clastic and carbonate sediments. Ability to analyze facies successions at different scales and constrain sedimentary architectures and associated processes in order to reconstruct depositional environments as accurately as possible and predict facies partitioning in an economic context (reservoirs, caps, traps).

Sedimentary Geology and Tectonics (L2) and Sedimentary Rocks and Surface Transfers (L3) modules or equivalents.

Continuous assessment: includes 4 fieldwork grades corresponding to each of the four days of work. 1 written exam grade.

For each environment, the approach includes a geomorphological analysis of the formations, an analysis of the associated deposition processes, a study of typical sequences and recognition criteria at different scales, classifications of the different types of formations, and finally their seismic and logging signatures. Each course is supported by the presentation of the most remarkable samples from the collections.
Practical fieldwork closely follows the course. They provide a real-world application of the concepts introduced in class. Four days (8:00 a.m. to 6:00 p.m.) are scheduled for this purpose. These are not excursions but specific work on remarkable outcrops, chosen to illustrate the different deposition systems as fully as possible, and for which a report is required:
(1) Lacustrine, proximal fluvial, and aeolian systems (Permian-Triassic of the Lodève Basin);
(2) Distal fluvial systems and mixed coastal systems (Rhaetian-Lias of the southern edge of the Larzac);
(3) Storm ramp system and turbiditic system (Ordovician-Visean of the southern slope of the Montagne Noire);
(4) Barred carbonate platform system (Upper Jurassic, Argelliers).