in an undisturbed sequence of sedimentary rocks, younger layers are on top of older layers, according to the principle of:

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05-12-2022
Geography

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in an undisturbed sequence of sedimentary rocks, younger layers are on top of older layers, according to the principle of:

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jaiswaljyoti jaiswaljyoti · Answer 1 · 2022-12-08T09:33:28-05:00

Principle of Superposition, states that in an undisturbed sedimentary sequence, the older beds are on the bottom, and the younger beds are on the top.

The law of superposition is a saying that forms one of the bases of the sciences of geography, prehistoric studies, and different fields relating to geographical stratigraphy. In its plainest structure, it states that in undeformed stratigraphic sequences, the oldest strata will lie at the lower part of the sequence, while fresher material stacks upon the surface to shape new deposits over the long haul. This is principal to stratigraphic dating, which requires a set of assumptions, including that the law of superposition holds valid and that an article can't be more established than the materials of which it is composed. To illustrate the useful applications of superposition in scientific request, sedimentary rock that has not been disfigured by more than 90° will show the oldest layers on the base, thus empowering paleontologists and paleobotanists to recognize the overall ages of any fossils tracked down inside the strata, with the remains of the most old lifeforms restricted to the lowest. These findings can illuminate the local area on the fossil record covering the important strata, to figure out which species coexisted transiently and which species existed successively in perhaps a developmentally or phylogenetically significant way.

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