Fossils and Geological Principles

Front

What are the divisions of geological time periods?

Back

Eons, Eras, Epochs.

Front

Which fossil is considered an index fossil useful for determining relative age?

Back

Ammonite.

Front

What is the longest time span in geological history?

Back

Precambrian.

Front

What does the Law of Superposition state?

Back

Younger rock layers are on top of older rock layers.

Front

Which era is known as the 'age of reptiles'?

Back

Mesozoic Era.

Front

What is an index fossil?

Back

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

Front

What are sedimentary rocks?

Back

Rocks formed by the accumulation of sediments, often containing fossils.

Front

What is the significance of the Precambrian period?

Back

It is the longest geological time period, covering about 88% of Earth's history.

Front

What is the difference between relative age and absolute age?

Back

Relative age is the age of an object in relation to another, while absolute age is the actual age in years.

Front

What is the Mesozoic Era known for?

Back

It is known for the dominance of dinosaurs and the development of mammals and birds.