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

Where are the oldest fossils typically found according to the Law of Superposition?

Back

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

Front

Which rock layer contains fossils of the most recently evolved organisms?

Back

The topmost layer (layer 1) contains fossils of the most recently evolved organisms.

Front

What does the term 'rock layer' refer to?

Back

A rock layer is a distinct layer of sedimentary rock that has formed over time, often containing fossils.

Front

What is the significance of the Kaibab formation?

Back

The Kaibab formation is considered relatively new compared to other rock layers like the Zoraster Granite.

Front

What type of organisms are typically found in the youngest rock layers?

Back

The youngest rock layers typically contain fossils of more recently evolved organisms, such as birds.

Front

What is the youngest layer in a given rock diagram labeled A, B, C, D?

Back

Layer A is the youngest layer in the diagram.

Front

How can scientists determine the relative age of rock layers?

Back

Scientists determine the relative age of rock layers by applying the Law of Superposition and examining the sequence of layers.

Front

What is a fossil?

Back

A fossil is the preserved remains or traces of ancient organisms, often found in sedimentary rock.

Front

What is the principle of original horizontality?

Back

The principle of original horizontality states that layers of sediment are originally deposited horizontally under the action of gravity.