3D Architecture and Along-Bend Sediment Distribution of a Hypertidal Point Bar in France

Explore the 3D architecture and along-bend sediment distribution of a hypertidal point bar in the Mont-Saint-Michel Bay, France, in this comprehensive seminar. Delve into the complexities of tidal meandering channels and their point-bar deposits, characterized by inclined heterolithic stratification, fining-upward vertical trends, abundance of fine-grained sediments, and tidal rhythmites. Examine a 3D time-framed accretionary package formed between March and November 2012, integrating Lidar topographic time-series data, geomorphological field surveys, and sedimentary-core data. Discover how the bar expanded through alternating depositional phases along its seaward and landward sides, with maximum thickness and mud accumulation occurring in the bar apex zone. Learn about the better preservation of tidal rhythmites in the apex zone and their scarcity in deposits along the bar sides. Understand the factors contributing to alternating depositional loci and high sediment accretion at the bend apex zone, including the spatio-temporal asymmetric nature of tidal currents and the development of low-energy conditions. Gain valuable insights into the sedimentology of hypertidal environments and their implications for coastal landscape evolution.

3D architecture and along-bend sediment distribution of a hypertidal point bar (France)