ventifact

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ventifact A pebble that has been faceted by the abrasive action of wind-blown sand and dust. Multiple faceting may reflect pebble movement as underlying sand is disturbed, rather than changes in wind direction. Each facet faces the direction of the abrading wind. A pebble with three facets (triangular facet) is called a ‘dreikanter’; one with one facet an ‘einkanter’.

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ventifact

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