Yardangs are best described as
-
A.
long narrow ridges of sand lying parallel to the direction of the prevailing winds -
B.
steep-side vertical bands of alternate hard and soft rocks aligned in the dircetion of the prevailing winds -
C.
flat, table-like masses with very resistant horizontal top layers and very steep sides -
D.
tabular, horizontal strata of alternate hard and soft rocks sculptured into a ridge and furrow landscape by wind -
E.
hills of sand formed by the accumulation of sand and shaped by the movement of winds