3 laws of relative age dating


12-May-2020 03:20

3 laws of relative age dating-44

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Relative dating uses the principles or laws of stratigraphy to order sequences of rock strata.

Relative dating not only determines which layers are older or younger, but also gives insight into the paleoenvironments that formed the particular sequence of rock.

Superposition in archaeology and especially in stratification use during excavation is slightly different as the processes involved in laying down archaeological strata are somewhat different from geological processes.

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The unconformity consists of many vertical tilted layers of grey shale overlaid by many layers of horizontal red sandstone.

Playfair later commented that, "the mind seemed to grow giddy by looking so far into the abyss of time." Mc Phee (1998) points out that Hutton removed humans from a specious place in time just as Copernicus had removed humans from a specious position in the universe (p. Hutton gives us three more laws to consider when seeking relative dates for rock layers, one of which, the law of inclusions was described earlier.states any feature that cuts across a rock or sediment must be younger than the rock or sediment through which it cuts.

Some archaeological strata (often termed as contexts or layers) are created by undercutting previous strata.

An example would be that the silt back-fill of an underground drain would form some time after the ground immediately above it.The law of superposition is an axiom that forms one of the bases of the sciences of geology, archaeology, and other fields dealing with geological stratigraphy.



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