Law of Superposition

Front

What is the Law of Superposition?

Back

The Law of Superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest layers are at the top.

Front

Which layer is the youngest according to the Law of Superposition?

Back

The youngest layer is the one at the top of the rock layers.

Front

Where are the oldest fossils typically found?

Back

Oldest fossils are typically found near the bottom of the rock layers.

Front

What does the presence of a fossil in a specific layer indicate?

Back

The presence of a fossil in a specific layer indicates the time period during which that organism lived.

Front

If Layer #6 contains animal E, what can we infer about its age?

Back

Animal E first appeared in Layer #6, indicating that it lived during the time when that layer was formed.

Front

What is a fossil?

Back

A fossil is the preserved remains or traces of a once-living organism, often found in sedimentary rock.

Front

What type of rock is most commonly associated with fossils?

Back

Fossils are most commonly found in sedimentary rock.

Front

What is the significance of the order of rock layers?

Back

The order of rock layers helps geologists determine the relative ages of the layers and the fossils within them.

Front

What is a trilobite?

Back

A trilobite is an extinct marine arthropod that lived during the Paleozoic era and is often used as an index fossil.

Front

What is an index fossil?

Back

An index fossil is a fossil that is used to define and identify a particular time period in the geological time scale.