Deposition

Question 1

Sorting of sediments:

Answer 1

Sediments will be sorted according to size in a stream (horizontal sorting)

Sediments in a pond are sorted by graded bedding/vertical sorting

Question 2

Sand bars:

Answer 2

Build up of size sediments in a stream or ocean at a point where the water slows

Question 3

Delta:

Answer 3

Fan shaped deposit where the stream enters a lake or the ocean at the point where the water slows and deposits material

Question 4

What affects deposition?

Answer 4

• Particle size (bigger particles drop first)
• Particle shape (rounder particles drop first)
• Particle density (most dense particles drop first)

Question 5

Glaciers:

Answer 5

Direct:
Glacial drift/till (unsorted)
Indirect:
Fluvio-galcial (from melted water, unsorted)

U-shape valley (sorted)

Question 6

Life of a stream:

Answer 6

Youthful:
-Fast moving, steep gradient rapids

Mature:
-Slows down, gradual decrease in gradient, flood plains begin to develop

Old Age:
-Very slow, large, carries much sediment, oxbow lakes, meanders, big flood plains