Question

In which situations is the principle of crosscutting relationships useful in determining relative age check all that apply

Answer 1

A fault breaks through sedimentary layers.

Igneous rock forms between sedimentary layers.

Explanation:

The principle of cross-cutting relationships is useful in determining relative ages where a fault breaks through sedimentary layers and when igneous rocks form between sedimentary layers.

• The principle of cross-cutting relationships suggest that a fault and an intrusion are younger than the rocks they cut through.
• A rock displacement and joints when seen in sedimentary rocks are obviously older than the rocks they cut through.
• Igneous intrusions between rock layers are also younger than the beds they cut through.
• In tilted beds, we use the law of original horizontality to resolve it.

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