Why is it so difficult for wind to pick up clay-sized particles?
A)They are too large for the wind to carry.
B)The wind has a near-zero velocity closest to the surface and can't pick them up.
C)The clay particles are often buried under larger sediments.
D)There is too much clay to carry.

Question

Quizplus · Accepted Answer

The wind has a near-zero velocity closest to the surface, and this creates a boundary layer of stagnant air that inhibits the movement of small particles like clay. This is known as the aerodynamic boundary layer and it is why wind is often unable to pick up clay-sized particles unless the wind velocity is very high.

Why Is It So Difficult for Wind to Pick Up