Alluvial fans and deltas have similar....?

Question

a.causes for deposition.
b.shapes of deposition.
c.sizes of sediment grains.
d.angles of slope.

Answer 1

You don't want A. Alluvial fans are associated with runoff from mountains hitting flat land. Deltas are associated with rivers hitting larger bodies of water.

B seems a good candidate since the principle of deposition is the same. High velocity sediment being stopped abruptly.

You could fit C in but it wouldn't hold true in every case. In fact alluvial fans are more likely to have larger grains.

D won't work as alluvial fans tend to be steeper than deltas, which don't have much of a slope at all.

Answer 2

As far as I know, they're all very similar. One difference between delta and alluvial fan would be the slope. Alluvial fans occur in valley or mountain regions, while delta's occur in relatively low land or land with low slope. Submarine fan's, as the name suggests, are basically underwater version of delta or alluvial fans.

Answer 3

b. (narrow, nearer the source and wider as it dissapates.)

Although you may stretch "a." to fit.

No reason for "c." to be true.

"d." is definetly out since a slop of a thousand miles cause the Mississippi River Delta, while a dozen miles or less of a hillside can cause an alluvial fan.

Answer 4

answers is a)