Law of superposition review

Front

What are the two main traits of the best index fossils?

Back

Widespread geographically and short lifespan.

Front

Which rock layer contains the newest fossils?

Back

Layer F.

Front

What is the relatively newest rock layer among the following: Kaibab formation, Zoraster Granite, Redwall limestone, Unkar group?

Back

Kaibab formation.

Front

Which fossil is considered relatively the oldest?

Back

Trilobite.

Front

Which organism appeared first: Deer, Dog, Human, Bear?

Back

Deer.

Front

What is the Law of Superposition?

Back

In undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top.

Front

Why are index fossils important in geology?

Back

They help to date and correlate the age of rock layers.

Front

What characteristics make a good index fossil?

Back

A good index fossil should be easily recognizable, widespread, and have a short geological lifespan.

Front

How can the Law of Superposition be used to determine the relative ages of rock layers?

Back

By examining the order of rock layers, geologists can infer which layers are older or younger.

Front

What is an example of an index fossil?

Back

Ammonites are commonly used as index fossils.