Trial Runs and Strange Results

Top view of apparatus after a while.
This (blurry) image looks up into the ring formation created by the marble. Side view of trial run.

Ghost of Scott...? The low viscosity room temperature layer created enough suction around the rock that all the copper colored sparkles stuck to the rock, but some irregular schlieren formation is illustrated.
Lower density sparkles created some interesting topography.
Illustrates equal density of "stoped block" and magma chamber.