How does grain size distribution impact the mobility and deposition of analogue pyroclastic density currents? (2022) Thesis Johnston, T. (2022). How does grain size distribution impact the mobility and deposition of analogue pyroclastic density currents?. (Thesis). University of Hull. Retrieved from https://hull-repository.worktribe.com/output/4224880 Pyroclastic density currents (PDCs) are hot, density-driven flows of gas, rock and ash generated during explosive volcanic eruptions or from the collapse of lava domes. PDCs are able to travel for tens of km, traversing topographic barriers hundreds... Read More about How does grain size distribution impact the mobility and deposition of analogue pyroclastic density currents?.