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In an undisturbed sequence of sedimentary rocks, younger layers overlay older layers, according to the principle of ____________.
a.superposition
b.original continuity
c.original horizontality
d.uniformitarianism

Respuesta :

Answer:

Correct option is part 'a' superposition.

Explanation:

Sedimentary rocks are formed when sediments are compressed under their own weight for a large period of time. Hence the layers that settle initially become the bottom layer's and hence are older than the layer's that are on the top.

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