Which of the following is true of eolian ripples?
A) They are generally positioned parallel with the direction of the effective wind.
B) Their spacing is controlled by the moisture content of the sand.
C) They are oriented transversely, or at right angles, to the direction of the wind.
D) They form reg deserts made up of lag gravels.

Question

Quizplus · Accepted Answer

Eolian ripples are formed by wind-blown sediment, and they are oriented perpendicular to the direction of the wind. This allows the wind to build up the sediment on the windward side of the ripple and then deposit it on the leeward side, creating the characteristic asymmetrical shape of eolian ripples. The spacing between the ripples is controlled by a combination of wind speed and sediment size, not moisture content. Eolian ripples can form in a variety of desert environments, not just in reg deserts composed of lag gravels.

Which of the Following Is True of Eolian Ripples