Which of the following are not depositional land forms in arid regions?

The correct answer is Yardangs.

• Yardang is an elongated erosional landform (not depositional), commonly found in deserts, resembling the hull of an inverted boat.

• Similar to sand dunes, yardangs typically have a tall, steep side facing the prevailing wind direction and slope gently down away from the wind.
• Yardangs are formed when looser material is eroded away (primarily by the wind and particle abrasion), leaving behind more consolidated material that is then sculpted into strange, ship-like shapes by further erosion. 

​Additional Information

• Deserts are regions with scanty rainfall, i.e. rainfall less than 25cm annually but still, rainwater plays a crucial role in the geomorphology of the arid landforms.
• However, the wind is the dominating agent of gradation in the arid regions of the world.
• Arid landforms are characterized by badlands, Mushroom rocks, dunes, yardang, etc. These features are typical in an arid region.
• Sand dune, any accumulation of sand grains shaped into a mound or ridge by the wind under the influence of gravity.

• Loess is a clastic, predominantly silt-sized sediment that is formed by the accumulation of wind-blown dust. Ten percent of the Earth's land area is covered by loess or similar deposits.

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• Ripple marks are ridges of sediment that form in response to the wind blowing along with a layer of sediment. They are form perpendicular to the wind direction and each ridge is roughly equidistant from the ripple mark on either side.

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