What is Yardang and zeugen?

What is Yardang and zeugen?

Yardang – elongated rock formation comprising vertical layers of alternately hard and soft rock. Zeuge – elongated rock formation comprising horizontal layers of alternately hard and soft rock. Rock-pedestal – a type of isolated zeuge; a mushroom-shaped rock that is undercut at the base.

What is difference between Yardang and Inselberg?

In arid regions, certain rocks .have hard and soft layers arranged vertically. Isolated residual hills rising abruptly from their surroundings are termed as inselbergs. When winds blow over these rocks, the soft layers get eroded leaving irregular crests. These are called Yardangs.

What is zeugen?

Zeugen – a table-shaped area of rock found in arid and semi-arid areas formed when more resistant rock is reduced at a slower rate than softer rocks around it under the effects of wind erosion.

What is a Yardang in geology?

Yardang, large area of soft, poorly consolidated rock and bedrock surfaces that have been extensively grooved, fluted, and pitted by wind erosion. The rock is eroded into alternating ridges and furrows essentially parallel to the dominant wind direction.

What are the similarities between zeugen and yardang?

The two names describes the same landform. Yardangs are formed on vertical hard/soft layers of rock, while zeugen (this is its plural form) are formed on horizontal bands of hard/soft rocks giving it a more mushroom-like shape.

Who coined the term inselberg?

The word inselberg is a loan word from German, and means “island mountain”. The term was coined in 1900 by geologist Wilhelm Bornhardt (1864–1946) to describe the abundance of such features found in eastern Africa.

Where are yardang formed?

Yardangs are formed in environments where water is scarce and the prevailing winds are strong, uni-directional, and carry an abrasive sediment load. The wind cuts down low-lying areas into parallel ridges which gradually erode into separate hills that take on the unique shape of a yardang.

What is Ventifact and Dreikanter?

Ventifacts are sand-blasted rocks. They are typically faceted and often display parallel grooves carved by wind-blown sand. Dreikanter is a rock polished by wind-blown sand that has three faces.

What’s the difference between A yardang and a Zeuge?

Yardangs are formed on vertical strata while zeugen on horizontal strata. Yardangs are formed by deflation while zeugen by abrasion. There is no difference. The two names describes the same landform.

How tall are yardangs and zeugens in Egypt?

These yardang ridges vary in height from 5 to 15 meters and can be as long as a kilometer. These landforms are usually undercut on their windward sides. Yardangs can be found in Algeria and Egypt. Rock Pedestal. A rock pedstal. Image credit RevisionWorld.com These are mushroom/tower-like shaped features formed as a result of wind abrasion.

How are yardangs and Zeugen depressions formed?

These comprise elongated depressions, developed by deflation along lines of weakness in the rock and commonly orientated in the direction of the prevailing winds, which are seaparated by upstanding or isolated masses of more resistant rock, the yardangs proper.

How tall are the zeugens in the desert?

Wind abrasion turns a desert surface which has a layer of resistant rock underlain by a layer of weak rock into ridges and furrows. The wind usually takes advantage of joints and cracks created by dew and frost as part of weathering processes. Zeugens may be as high as 30 meters in height.