sediment - aeolian deposition Flashcards
1
Q
what is aeolian deposition?
A
when winds are stronger than 40km/hr = surface rolling and saltation
2
Q
what is sand abrasion?
A
sand is relatively heavy so rarely carried by the wind in suspension.. so abrasion only occurs up to a height of 1m. sand abrasion has a limited effect on rocky coastlines
3
Q
what does power of sand increase with?
A
the erosive power of sand increases exponentially with increased wind velocity
4
Q
why is dry sand easier for wind to pick up?
A
because the wet sand sticks together
5
Q
why is attrition effective in wind?
A
no film of water around sand particles they crash into each other and break into smaller pieces
6
Q
when will deposition happen?
A
when friction of the land slows down energy of the wind and it has to drop the sand
