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Meghan Nick Andrew Jamal

meghan daly

on 17 January 2015

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Transcript of wind

Sand Dunes

The source of the sand may be ancient offshore deposits or material eroded from cliffs
Sand Dunes are a combination of Constructive and Destructive forces
Are Usually found in deserts and examples of this are: Great Sand Dune national Park and Indiana Dunes national lake shore
Once sand begins to pile up, ripples and dunes can form.Wind continues to move sand up to the top of the pile until the pile is so steep that it collapses under its own weight
In order for sand dunes to develop, you need an abundant supply of fine sand , a prevailing onshore wind and then something to trap and retain the sand. Wind creates sand dunes.
The group topic fits with my feature because sand dunes wouldn't occur without wind
Rock Pedestals
A zeugen is a result of a constructive force
A Yardang is the result of a constructive force
It is a constructive force because it does not damage the Earths surface
It is formed when more resistant rock is reduced at a slower rate than softer rocks around it
It is formed by wind and erosion
It is a constructive force because it is created, not destroyed
A yardang is created by wind erosion where the water is scarce and the winds are strong
You can find zeugens in the deserts
a famous zeugen monument valley can be found in the southern Utah and northern Arizona
By: Meghan D, Andrew F, Nick B, Jamal D
More about Yardangs
A zeugen is a table shaped area of a rock
Famous Yardangs can be found in these following locations, Lut desert in Iran, Hole In The Rock in Papago Parkin in Phoenix Arizona
Yardangs have been seen on Mars
When Viewing Yardangs from above, it resembles the hull of a boat
Wind sculpts a rock into pedestals by wind abrasion and weathering therefor making my feature constructive
The creation of rock pedestals are caused by sand and wind erosion, due to the harder rock being at the top of the formation, it erodes slower giving it a " V " shape

Wind Abrasion is the mechanical scraping of a rock surface by friction between rocks and moving particles
This picture is of a Balancing Rock in Nova Scotia
There are rock pedestals everywhere in Burma, Norway, Colorado etc... but you can find one famous rock pedestal in Utah called The Mexican Hat
The Mexican Hat
Mexican Hat is named after a geological marvel of erosion. The continual sands, wind, and water of time have sculpted the sandstone of the Mexican Hat Rock into a Sombrero
It could take thousands or even millions of years in some cases to create a rock pedestal
Golden Rock, Burma
Kjeragbolten, Norway
Balanced Rock, Colorado
Full transcript