Chapter 6 The Rock and Fossil Record

A principle that states geologic change occurs suddenly.

• Catastrophe

• Castrophism

• Uniformitarianism

• Uniform

Dying out of many species on Earth within a short period of time

• Petrified

• catastrophism

• uncomformity

• mass extinction

A river continues to deepen and erode a canyon at a rate of a few milimeters per year. What geologic principle is this an example of?

• geographism

• catastrophism

• uniformitarianism

• gradualism

What is a principal that states that geologic processes that occurred in the past can be explained by current geologic processes.

• Catastrophism

• Unconformity

• Uniformitarianism

• Angular Unconformity

Any method of determining whether an event or object is older or younger than other events or objects.

• Relative Dating

• Absolute Dating

• Isotope

• Speed Dating

A break in the geologic record created when rock layers are eroded or when sediment is not deposited for a long period of time.

• Disconformity

• Monoconformity

• Unconformity

• Angular Unconformity

A principle that states that younger rocks lie above older rocks if the layers have not been disturbed.

• geology

• The geologic column

• The fossil record

• Superposition

Check all of the examples of catastrophism

• weathering

• erosion

• tornado

• volcanic eruption

• hurricane

Which layer is OLDER? Fault E or Intrusion D?

• Fault E

• Intrusion D

The best index fossils have which two traits?

• widespread geographically, long lifespan
• widespread geographically, short lifespan
• specific place, long lifespan
• specific place, short lifespan