noun
- a clay mineral that is amorphous or poorly crystallized, typically formed by the weathering of volcanic ash
Usage: geology; mineralogy
Examples
- Allophane is commonly found in soils derived from volcanic materials.
- The clay’s high water retention was attributed to its allophane content.
- Researchers studied the allophane deposits in the volcanic region.
- Allophane gives certain soils their distinctive properties.
- The formation of allophane occurs through chemical weathering processes.