Many rocky coasts occur along active margins. This is because active margins oft
ID: 299848 • Letter: M
Question
Many rocky coasts occur along active margins. This is because
active margins often experience repeated uplift, and thus the waves have not had sufficient time to erode the land surface down to sea level.
active margins tend to have far fewer streams that feed sediment to the oceans; thus, there is not enough sand to create beaches.
subduction along active margins consumes coastal sediments.
active margins are associated with larger storms, which cause more erosion of sediment, leading to fewer beaches.
a.active margins often experience repeated uplift, and thus the waves have not had sufficient time to erode the land surface down to sea level.
b.active margins tend to have far fewer streams that feed sediment to the oceans; thus, there is not enough sand to create beaches.
c.subduction along active margins consumes coastal sediments.
d.active margins are associated with larger storms, which cause more erosion of sediment, leading to fewer beaches.
Explanation / Answer
Answer is option a, i.e. active margins often experience repeated uplift, and thus the waves have not had sufficient time to erode the land surface down to sea level.
Because active margins are found in the edge of a continental plate which is crashed with an oceanic plate. And it can be seen that this active margins are uplifted rocky coasts are downlifted. So, the waves have not sufficient time to erode the surface down to sea level. Hence, Many rocky coasts occur along active margins. This is because active margins often experience repeated uplift, and thus the waves have not had sufficient time to erode the land surface down to sea level.
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