Question

How did the clasts in the picture below become rounded? they are composed of relatively soft materials they have been moved by the wind and rounded by blowing sand in sand dunes they have been transported a significant distance None of the above

Answer 1

Answer 21 : The clasts shown in the image have been rounded as they have been transported to a significant distance during which abrasion, attrition has resulted in rounding off the edges of the clasts.

Answer 22 : A cross bed forms from the piling down of sediments down a dune or ripple, that is by the process of downstream migration of the bedforms such as dunes or ripples in a flowing fluid

Answer 23 : The processes of physical weathering involves all of those geological process that helps in breaking a rock apart without changing their chemical composition. Examples of physical weathering include Freeze thaw, unloading, root wedging.