Sequence Earth History
Middle School Science · Flashcards · Application
MIDDLE SCHOOL SCIENCE · FLASHCARDS
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QUESTION
Which event is indicated by a wavy erosional surface separating parallel sedimentary layers?
QUESTION
Identify the relative order: Layer A is below Layer B in undisturbed strata; which is older?
QUESTION
Identify the relative age: An igneous dike cuts across a sandstone layer.
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ANSWER
The dike is younger than the sandstone. Cross-cutting principle: the dike formed after the sandstone it cuts.
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