Erosional features in aeolian topography are landforms that are created as a result of the wind's erosive action on the Earth's surface. These features are commonly found in arid and semi-arid regions where the wind is the dominant agent of erosion. Aeolian topography is characterized by the deposition and erosion of sediment by wind, which leads to the formation of unique landforms. Here are some of the erosional features commonly found in aeolian topography:

1. Ventifacts:
Ventifacts are rocks that have been shaped and polished by windblown sediment. As the wind carries particles and sand, it impacts the exposed rocks, causing abrasion and erosion. Over time, this constant grinding action results in ventifacts with smooth, polished surfaces and unique shapes.

2. Yardangs:
Yardangs are elongated ridges or hills that are formed by wind erosion. They have a streamlined shape, with their long axis aligned parallel to the direction of the prevailing wind. Yardangs are commonly found in arid desert regions and can vary in size from a few meters to several kilometers in length.

3. Deflation Hollows:
Deflation hollows are shallow depressions formed by wind erosion. They occur when the wind removes loose surface material, such as sand and silt, leaving behind a depression in the landscape. Deflation hollows can vary in size and shape, and they are often found in deserts and other arid regions.

4. Desert Pavements:
Desert pavements are flat, rocky surfaces composed of closely packed pebbles and stones. They are formed when wind erosion removes the finer particles, such as sand and silt, from the surface, leaving behind a layer of larger rocks and pebbles. Desert pavements protect the underlying soil from further erosion by the wind.

5. Mushroom Rocks:
Mushroom rocks are unique erosional features that consist of a large boulder perched on top of a narrow pedestal. They are formed when wind erosion erodes the softer underlying rock, leaving behind a more resistant capstone. Mushroom rocks can be found in desert regions and are often a popular tourist attraction.

In conclusion, erosional features in aeolian topography are formed by the wind's erosive action on the Earth's surface. These features include ventifacts, yardangs, deflation hollows, desert pavements, and mushroom rocks. They are commonly found in arid and semi-arid regions and add to the uniqueness and beauty of aeolian landscapes.