Sébastien Carretier gave an invited talk at the Steepest Descent meeting entitled « Millennial dispersion rate of river pebbles from 10Be and  models » (Vienna, 8 April), and then another one entitled « Stochastic transport of pebbles in a Chilean canyon over millennia revealed by 10Be and a simple transport model » in a session of the EGU (Vienna, 8–13 April 2018).