Question

Four rock outcrops, labeled 1, 2, 3, and 4, found within the same plateau, are represented below. Index

fossils found in some of the rock layers are shown. The rock layers have not been overturned.

Which rock layer is the youngest?
(1) sandstone in outcrop 1
(2) breccia in outcrop 2
(3) conglomerate in outcrop 3
(4) sandstone in outcrop 4

Answer 1

Rock Layers and Index Fossils Exploration

Figure 1: Rock Layers

Answer 2

By looking at the four graphs given and the rock layers have not been overturned. The youngest rock layer out of the four is going to be the third graph. The correct answer is the conglomerate in outcrop 3.