How to pronounce “scudding” in English

of crust, the tectonic plates, are moving and drifting around relative to each other in a very, very slow timescale from a human point of view,but scudding across the surface of the earth when you look at the whole history of the planet.And we've talked already about the opening up of the Rift Valley, and the Red Sea, and the Gulf of Aden that drove our own evolution.