Geologic Time Scale Flashcard

Front

What is the primary focus of a geologist?

Back

Studying the Earth's crust

Front

Which branch of geology deals with sedimentary rock layers? Options: Paleontology, Stratigraphy, Geochemistry, Volcanology

Back

Stratigraphy

Front

What does the Law of Superposition state?

Back

Younger rocks are found on top of older rocks

Front

What is relative age?

Back

The age of a rock compared to another rock

Front

Which of the following is an example of a disturbance that can affect rock layers?

Back

E

Front

What are index fossils used for?

Back

To indicate boundaries in geological time.

Front

Which characteristic is NOT associated with index fossils? Options: Easily recognizable, Abundant, Wide geographic distribution

Back

Long lifespan

Front

What is the main purpose of the fossil record?

Back

To document the history of life

Front

What is absolute age dating also known as?

Back

Radiometric dating

Front

What does half-life refer to?

Back

The time it takes for half of a radioactive element to decay.