Visualize five horizontal undeformed sedimentary strata exposed in a cliff or canyon wall identified by consecutive numbers, with 1 representing the lowest of the five beds and 5 representing the highest of the 5 beds. Which of the following statements concerning the strata is true?
A) Bed 4 is older than bed 2.
B) Bed 5 is the oldest.
C) Beds l and 3 are older than bed 4.
D) Bed 3 is older than beds 2 and 4.

Question

Quizplus · Accepted Answer

In undeformed sedimentary strata, the principle of superposition states that the oldest layers are at the bottom and the youngest are at the top. Therefore, beds 1 and 3 are older than bed 4.

Visualize Five Horizontal Undeformed Sedimentary Strata Exposed in a Cliff