Discussion
The surface features of .................. are those of three-dimension circular to elliptical draping humps and swals of about 01 meter in length 10s cm in heights.
Answer: C
The description fits hummocky cross stratification.
Hummocky cross stratification consists of gently curved laminae forming low, three-dimensional domes (hummocks) and hollows (swales), roughly circular to elliptical, a metre or more across and only some tens of centimetres high. It forms in shallow marine sand below fair-weather wave base under storm waves, and is a key indicator of storm deposits.
Trough cross stratification forms by migrating three-dimensional dunes and has scoop-shaped sets cut into one another, simple (planar) cross stratification comes from straight-crested bedforms, and ripple drift (climbing ripple) lamination forms where ripples migrate while sediment rains out. None produces the draping humps and swales described.
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