QuestionFebruary 10, 2026

4 Explain why the age of a fault is younger than the rocks in which it is found?

4 Explain why the age of a fault is younger than the rocks in which it is found?
4
Explain why the age of a fault is younger than the rocks in which it is found?

Solution
4.4(169 votes)

Answer

A fault is younger because it cuts through older rocks, indicating it formed after them according to the Law of Cross-Cutting Relationships. Explanation 1. Define relative dating principle A fault cuts through pre-existing rocks, meaning the rocks must have formed first. 2. Apply Law of Cross-Cutting Relationships **If a geologic feature cuts across another, it is younger than the feature it cuts.** 3. Conclude with logical sequence Since the fault disrupts the rock layers, the fault occurred after the rocks formed, making it younger.

Explanation

1. Define relative dating principle <br /> A fault cuts through pre-existing rocks, meaning the rocks must have formed first. <br />2. Apply Law of Cross-Cutting Relationships <br /> **If a geologic feature cuts across another, it is younger than the feature it cuts.** <br />3. Conclude with logical sequence <br /> Since the fault disrupts the rock layers, the fault occurred after the rocks formed, making it younger.
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