A layer-cake profile of different soil types is exposed when we dig into the earth. Geologists reason that these layers were laid down sequentially, and that layers lower down have to be older than the layers above them. This is called the law of
A) superposition
B) cross-cutting relationships
C) the jungle
D) unconformities

Question

Quizplus · Accepted Answer

The law of superposition states that in any sequence of undisturbed layers of sedimentary rocks, the oldest layer is at the bottom and the layers become progressively younger toward the top.

A Layer-Cake Profile of Different Soil Types Is Exposed When