igneous
Pumice or Tuff
Pumice / Tuff
Light-colored, highly vesicular, low density, often contains small dark phenocrysts or lithic fragments.
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Physical properties
Light-colored, highly vesicular, low density, often contains small dark phenocrysts or lithic fragments.
Formation & geological history
Formed from explosive volcanic eruptions where magma is rapidly depressurized and cooled, trapping gas bubbles.
Uses & applications
Used as an abrasive, in lightweight concrete, and for landscaping.
Geological facts
Pumice is often light enough to float on water.
Field identification & locations
Identified by its highly porous texture and light weight. Commonly found in areas with active or geologically recent explosive volcanism.
