The Kaibab limestone layer of sedimentary rock is the closest to Earth's surface; therefore, ____.
A) it contains fossils of extinct species only
B) it contains the greatest density of fossils
C) it is part of the K-Pg boundary sequence
D) it is the oldest layer
E) it is the youngest layer

Question

Quizplus · Accepted Answer

In the principle of superposition in sedimentary layers, the topmost layer is the youngest because it was deposited last. The Kaibab limestone, being closest to Earth's surface, would therefore be the youngest layer among those mentioned.

The Kaibab Limestone Layer of Sedimentary Rock Is the Closest