Mineral DendritesDendron = plant.Naturally occurring fissures in limestone and other rock arepercolated by manganese and iron solutions. Often mistaken forfossils.
Branched ElectrodepositionDendritic structures also form when materials freeze or crystallize out ofequilibrium. e.g: high voltage metal electrodeposition.Picture: Copper aggregate in copper sulphate solution
SimulationThe first computer model was given by Tom Witten at the College dé France and LenSander at the University of Michigan (~2000 citations), to describe how dust particlesform clumps in the air.
Simulation: Line SeedSnapshot at dynamic equilibrium with about 250 drifters and 1300 aggregates, eachof radius 0.005 units.
Formation of Mineral DendritesSolutions of metal and oxide ions diffuse through rockcracks.When they meet, they produce a soluble compound.Beyond a concentration, the compound forms a colouredprecipitate.On meeting a precipitate molecule, a dissolved compoundmolecule sticks to it and adds to the precipitate.Therefore, the mechanism is the same as electrodeposition.