AN INTERESTING ONE FROM HENK: Pondering the genesis program of - TopicsExpress



          

AN INTERESTING ONE FROM HENK: Pondering the genesis program of this specimen, one may be caused to wonder on the changes to the banding process. From gravitational banding (water-level), to surface sheathing (formation of the pendant stalactite-like growths), to adhesional banding (fortification/bullseye). Once one can grasp the concept that the type of banding is directly related to the flow and availability of silica in a saturated solution with water, such changes are understandable. Gravitational (water-level), when the cavity never remains full for long (with vapour in the free space above the solution. Sheathing, when the vapour space is penetrated from the top by very slow, minor leaks and the solution envelopes and the growth slowly thickens. And adhesional (fortification/bullseye) when the cavity remains full of liquid solution for the duration...
Posted on: Tue, 21 Oct 2014 08:56:55 +0000

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