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A ventifact (also wind-faceted stone, windkanter [1]) is a rock that has been abraded, pitted, etched, grooved, or polished by wind-driven sand or ice crystals. [2] The word “Ventifact” is derived from the Latin word “Ventus” meaning ‘ wind ’.
The earliest form of tracery, called plate tracery, began as openings that were pierced from a stone slab. Bar tracery was then implemented, having derived from the plate tracery. However, instead of a slab, the windows were defined by moulded stone mullions, which were lighter and allowed for more openings and intricate designs. [4]
A dreikanter from the Wind River Basin, Wyoming, USA. Property of Western Washington University. Photo by AJ Wakefield, 2012. A dreikanter is a type of ventifact that typically forms in desert or periglacial environments due to the abrasive action of blowing sand. [1] [2] Dreikanters exhibit a characteristic pyramidal shape with three wind ...
Dry stone walls in the Yorkshire Dales, England. Dry stone, sometimes called drystack or, in Scotland, drystane, is a building method by which structures are constructed from stones without any mortar to bind them together. [1] A certain amount of binding is obtained through the use of carefully selected interlocking stones.
A ship had been wrecked in the cove, and while watching ensuing activity, the employee leaned against a boulder. Suddenly, a gust of wind occurred, and the boulder shifted, or "logged". The longest side of this mass of stone is about 15 feet (4.6 m), and the circumference of its biggest end is about 20 feet (6.1 m).
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