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- Ventifact abstract "Ventifacts are rocks that have been abraded, pitted, etched, grooved, or polished by wind-driven sand or ice crystals. These geomorphic features are most typically found in arid environments where there is little vegetation to interfere with aeolian particle transport, where there are frequently strong winds, and where there is a steady but not overwhelming supply of sand.Ventifacts can be abraded to eye-catching natural sculptures such as the main features of White Desert protectorate near Farafra oasis. In moderately tall, isolated rock outcrops, mushroom shaped pillars of rock may form as the outcrop is eroded by saltating sand grains. This occurs because, even in strong winds, sand grains can't be continuously held in the air. Instead, the particles bounce along the ground, rarely reaching higher than a few feet above the earth. Over time, the bouncing sand grains can erode the lower portions of a ventifact, while leaving a larger less eroded cap. The results can be fantastic stone mushrooms.Individual stones, such as those forming desert pavement, are often found with grooved, etched, or polished surfaces where these same wind driven processes have slowly worn away the rock.When ancient ventifacts are preserved without being moved or disturbed, they may serve as a paleo-wind indicators. The wind direction at the time the ventifact formed will be parallel to grooves or striations cut in the rock. An example of a Martian ventifact was named Jake Matijevic. By analyzing its shape, it was possible to reconstruct the main wind direction which sculpted the rock.".
- Ventifact thumbnail Weisse_Wüste.jpg?width=300.
- Ventifact wikiPageExternalLink bar.htm.
- Ventifact wikiPageID "247768".
- Ventifact wikiPageRevisionID "604771043".
- Ventifact hasPhotoCollection Ventifact.
- Ventifact subject Category:Aeolian_landforms.
- Ventifact subject Category:Petrology.
- Ventifact subject Category:Rocks.
- Ventifact type NaturalObject100019128.
- Ventifact type Object100002684.
- Ventifact type PhysicalEntity100001930.
- Ventifact type Rock109416076.
- Ventifact type Rocks.
- Ventifact type Whole100003553.
- Ventifact comment "Ventifacts are rocks that have been abraded, pitted, etched, grooved, or polished by wind-driven sand or ice crystals.".
- Ventifact label "Ventifact".
- Ventifact label "Ventifacto".
- Ventifact label "Windkanter".
- Ventifact label "Windkei".
- Ventifact sameAs Windkanter.
- Ventifact sameAs Ventifacto.
- Ventifact sameAs 삼릉석.
- Ventifact sameAs Windkei.
- Ventifact sameAs m.01ktxm.
- Ventifact sameAs Q201916.
- Ventifact sameAs Q201916.
- Ventifact sameAs Ventifact.
- Ventifact wasDerivedFrom Ventifact?oldid=604771043.
- Ventifact depiction Weisse_Wüste.jpg.
- Ventifact isPrimaryTopicOf Ventifact.
