Infilling

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Infilling - closing the gap


Let the rocks tell their story



quartz infilling a rock cavity


Open space filling is the hallmark of epithermal vein systems.
In this specimen a cavity is filled with low temperature fluids in which quartz (silicon dioxide) is dissolved.
As the fluid cools the dissolved quartz mineral preciptates and forms crystals.
The crystals grow out at right angles from the cavity wall.
The larger the crystals, the longer the period of crystallisation.