Multiple choice

Superposition says

  1. the oldest rock is at the bottom, the youngest at the top

  2. the layer above forms from erosion

  3. the rock that cuts through is younger than the rock it cuts

  4. Intrusions are younger than the rock it intrudes through
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Law of Superposition states that in an undisturbed sequence of sedimentary rocks, each layer is older than the one above it and younger than the one below it.

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