Unit 4: Earth's History

The Law of Superposition helps scientists to determine what?

• The absolute age of rock layers
• The age of fossils
• The relative age of rock layers
• the super powers of rocks

According to the law of superposition, the oldest fossils are found 

• At the top of the rock layers
• Near the bottom of the rock layers
• In the middle of the rock layers
• Somewhat near the surface

_{Which rock layer in the diagram seems to be the oldest?}

• F
• E
• B
• A

gaps in rock layers caused by erosion are called

• law of superposition
• unconformities
• uniformitarianism
• relative dating

The ________ states that layers of sediment were originally deposited horizontally under the action of gravity.

• law of superposition
• law of horizontality 
• uniformitarianism 
• unconformities

states that the geologic feature which cuts another is the younger of the two features

• law of horizontality
• cross cutting relationships
• law of superposition
• uniformitarianism

Which of the following is the oldest?

• Layer L
• Intrusion D
• Intrusion H
• Layer E

Letter "A" is an....

• inclusion
• intrusion
• fault
• unconformity 

Letter "F" is a....

• inclusion
• intrusion
• fault
• unconformity 

The rock formation labeled "P" is a(n)...

• fault
• intrusion
• inclusion
• unconformity