Law of Superposition

Front

What is the Law of Superposition?

Back

The Law of Superposition states that in any undisturbed sequence of rocks, the oldest layers are at the bottom and the youngest layers are at the top.

Front

What does the term 'rock layer' refer to?

Back

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

Front

In a diagram of rock layers, where would you typically find the oldest fossils?

Back

The oldest fossils are typically found near the bottom of the rock layers.

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 is an intrusion in geology?

Back

An intrusion is a body of igneous rock that has formed from magma that has cooled and solidified beneath the Earth's surface.

Front

What is a fault in geological terms?

Back

A fault is a fracture or zone of fractures between two blocks of rock, which can cause earthquakes.

Front

What does it mean if a rock layer is described as 'undisturbed'?

Back

An undisturbed rock layer is one that has not been altered by geological events such as folding, faulting, or erosion.

Front

What is the significance of studying rock layers?

Back

Studying rock layers helps geologists understand Earth's history, including the age of rocks and the evolution of life.

Front

What is the difference between relative dating and absolute dating?

Back

Relative dating determines the age of rocks and fossils in relation to one another, while absolute dating provides a specific age in years.

Front

What is folding in geology?

Back

Folding is the bending of rock layers due to tectonic forces, which can create mountains and valleys.