| Details: |
Natural landscapes are shaped under water flows and wind action, and the understanding of their morphodynamics goes through the identification of the physical mechanisms at play. The processes of erosion of sediment composed of macroscopic grains have been extensively studied, which is not the case of the erosion by dissolution. However, this process plays a significant role in area covered by a dissoluble mineral like in Karst regions
In this talk we will show that erosion by dissolution is the cause of the formation of remarkable patterns like limestone pavements, scallops, dissolution rilles, dissolution pinnacles or limestone forests. Then we'll focus on the case of scallops dissolution. We'll show how laboratory experiments have reproduced the process, and we'll give our physical understanding of the starting instability thanks to computer simulations. |