Question

A geologist finds some tilted sedimentary rock layers.

Which conclusion can the geologist draw by looking at the rock layers?

Their absolute age is 600 million years.
They were tilted before they were deposited.
They were originally deposited horizontally.
The youngest layer was originally deposited as the bottom layer.

Answer 1

They were originally deposited horizontally.

This follows the principle of original horizontality: sedimentary beds are laid down nearly horizontal and were later tilted by tectonic forces.