A diagram shows a cutaway view of layers of rock. The top horizontal layer is labeled A. Under that layer is another horizontal layer labeled B. Layer D is under layer B and is tilted. Under that layer is layer E, which is also tilted. Under that layer is layer F, which is tilted. Under that layer is layer G, also tilted. Layer J appears under layer G. Layer I cuts horizontally through layers B, D, E, F, G, and J. A line labeled H cuts diagonally through layers A, B, E, F, and G.
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A geologist examining a road cut at this location would recognize that Layer I is than Fault H. This conclusion is made through the principle of .
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A geologist examining a road cut at this location would recognize that Layer I is younger than Fault H. This conclusion is made through the principle of cross-cutting relationships.
According to this principle, a geological feature (like a fault or an intrusion) that cuts across another feature is younger than the feature it cuts through. Since Layer I cuts horizontally through layers B, D, E, F, G, and J, it must be younger than those layers, including Fault H.
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