Telestack link conveyors transfer material between processes in a highly cost-efficient and environmentally sound manner. The machines can be used to Provide a mobile link between an excavator, mobile crushing unit and fixed overland conveyor for efficient onward transfer of material to secondary processing stages within mining and quarrying operations Alternatively they can be used to Provide a mobile link for transferring material between a ship unloading conveyor or hopper unit to a quayside storage area for stockpiling or secondary processing