When marine geologists collects a core of undeformed ocean-floor sediment, they know that the youngest layer is on the top of the core and the oldest is at the bottom because of the principle of __.

Question

Quizplus · Accepted Answer

The principle of superposition states that in an undeformed sequence of sedimentary rocks, each layer is younger than the one below it and older than the one above it. This principle applies to ocean-floor sediment as well, and therefore the youngest layer is on the top of the core and the oldest is at the bottom.

When Marine Geologists Collects a Core of Undeformed Ocean-Floor Sediment