If dike A cuts across sill B, beds above and below the sill are older than A and B

Name: If dike A cuts across sill B, beds above and below the sill are older than A and B
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Quizplus · Accepted Answer

The principle of cross-cutting relationships states that a geological feature (like a dike) that cuts across another feature (like a sill) is younger than the feature it cuts through. Therefore, the beds above and below the sill, which are not cut by the dike, must be older than both the dike and the sill.

If Dike a Cuts Across Sill B, Beds Above and Below