Which of the four numbered features on this figure is the oldest?
A)1
B)2
C)3

Question

Which of the four numbered features on this figure is the oldest? 
A)1 
B)2 
C)3

Quizplus · Accepted Answer

In the absence of any scale or time frame provided in the figure, it is impossible to determine the age of the features based on visual inspection alone. Therefore, we must make an assumption based on the geological principle of superposition, which states that in a sequence of undisturbed sedimentary rocks, the oldest layer is at the bottom and the youngest is at the top. Since feature 1 is located at the bottom of the diagram, it is reasonable to assume that it is the oldest.

Which of the Four Numbered Features on This Figure Is