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Llana [10]
3 years ago
15

Trenches form at sites where?

Geography
2 answers:
kondor19780726 [428]3 years ago
8 0
<span> Its where one plate descends beneath another.</span>
never [62]3 years ago
4 0

Answer:

At the site of convergent plate boundary

Explanation:

The trenches are the narrow and deep V-shaped depression that is formed at the convergent plate boundary, where the heavier plate subducts below the less denser plate. This feature marks the presence of a subduction zone, that lies just below the trench. This trenches usually borders an island arc or a continent.

The deepest of all the trench is the Mariana trench which has a depth of nearly 11 km.

Thus, the trenches are formed at the site of convergent plate boundary, where one plate goes below the other.

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Faunal Succession: Similar to the law of superposition is the law of faunal succession, which states that groups of fossil animals and plants occur throughout the geologic record in a distinct and identifiable order. Following this law, sedimentary rocks can be “dated” by their characteristic fossil content. Particularly useful are index fossils, geographically widespread fossils that evolved rapidly through time.

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