Passive continental margins typically haveGroup of answer choicesbroad continental shelvesdeep trenchesrift valleysa lot of earthquakes
Question
Passive continental margins typically have
- broad continental shelves
- deep trenches
- rift valleys
- a lot of earthquakes
Solution
Passive continental margins typically have broad continental shelves.
Here's why:
-
Passive continental margins are found at the edge of a continent where it is not in contact with another tectonic plate. This means there is little to no tectonic activity, such as earthquakes or volcanic eruptions.
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Because of the lack of tectonic activity, sediment that erodes from the continent accumulates over time, forming a broad, gently sloping continental shelf.
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Deep trenches and rift valleys are typically associated with active continental margins, where tectonic plates are colliding or separating.
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The lack of tectonic activity at passive margins also means there are fewer earthquakes compared to active margins.
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