Three-dimensional (3D) dunes have the following characteristics. (There is more than one correct answer)

Question

Three-dimensional (3D) dunes have the following characteristics.  (There is more than one correct answer)

Accepted Answer

They have curved crests

Accepted Answer

Their internal structure is characterised by cross bedding

Accepted Answer

They range in length from a few meters to 1000s of m

Answer

They are always smaller than 20 cm in length

Answer

They typically occur together with groove casts

Answer

They have straight crests

Answer

They are associated with tabular cross bedding

Crowdly