Many times it is difficult to see the layers of the Earth firsthand. Therefore, scientists take strike and dip measurements along the surface of the Earth to determine what the layers look like at depth. Understanding that the fold axis is an imaginary hinge at the apex of a fold, a geologist would know that the presence of an anticline exists when multiple layers are exposed and:

Question

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In an anticline, the rock layers dip outward or away from the fold axis, and the rock layers become progressively older as you move away from the axis. This is because the oldest layers are found at the core of the anticline, with younger layers surrounding them.

Many Times It Is Difficult to See the Layers of the Earth