Question

Reorder the rock layers from oldest to youngest.

Limestone Layers

Banded-iron formations

Metamorphic rocks with fine grains

Red beds

Chert layers

Answer 1

The principle of superposition states that the oldest sedimentary rock units are at the bottom, and the youngest are at the top. Based on this, layer C is oldest, followed by B and A. So the full sequence of events is as follows: Layer C formed.