Chemistry, 27.07.2019 13:10 makaylahunt

In a stack of undisturbed rock layers, the upper layers are younger than the lower layers. this is also stated as the law of

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Chemistry, 22.06.2019 01:30, josephaciaful

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Chemistry, 22.06.2019 10:30, cheyennecarrillo14

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In a stack of undisturbed rock layers, the upper layers are younger than the lower layers. this is a...