The Principle of Superposition states that in sedimentary strata, the oldest uni

Question

The Principle of Superposition states that in sedimentary strata, the oldest units are on the bottom and the units get progressively younger moving upward. (The exception to this is if the units have been overturned, but we will not deal with this concept.) Match the images below to the phrase that describes the location of the oldest beds in each fold. Answers may be reused, if necessary. Which of the following cross-sections best corresponds with the line A-A' depicted in the geologic map below?

Explanation / Answer

B

A

Since the first fold is an anticline, the oldest beds are at the center

Since the second fold is a syncline, the older beds are at the limbs

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