Question

A geology professor creates a small-scale model of one of the principles of relative-age dating. The professor pours several layers of sand into a large container. Each layer is a different color. Students analyze the layers to identify which colors represent the oldest and the youngest layers. What principle of relative-age dating is being modeled here, and how do we know?

A) Superposition, because it deals with the order in which the layers are deposited
B) Lateral continuity, because it describes how sediments deposit in layers
C) Inclusions, because small particles like sand must have several inclusions
D) Cross-cutting relationships, because the sand colors must mix across layers

Answer 1

The principle of relative-age dating being modeled here is superposition, which deals with the order in which the layers are deposited. By pouring different-colored layers of sand into a container, the professor simulates the formation of sedimentary rock layers and allows students to identify the oldest and youngest layers.

Step-by-step explanation:

The principle of relative-age dating being modeled here is A) superposition, because it deals with the order in which the layers are deposited. Superposition states that in layers of horizontal sedimentary rocks, the oldest rock layer is at the bottom and the youngest is at the top. By pouring several layers of sand into a large container, each layer representing a different color, the geology professor is simulating the formation of sedimentary rock layers and allowing students to analyze the layers and identify the oldest and youngest based on their order.