In your opinion, if there were a fine dust with a very low stickiness such as silicone particles would the presence of a gas between the particles have a considerable affect in reducing the viscosity of the volume of dust? Would raising the temperature enhance this reduction much? My reason for asking is that I have a hypothesis that the canyons of Mars were carved by rivers of silicone dust as developed in this article; http://www.webspawner.com/users/theory