Earth History

Which event occurred at the start of the Mesozoic Era?

• earliest insects

• earliest dinosaurs

• extinction of the mastodant

• appearance of reptiles

Which of the following periods came first?

• Devonian

• Ordovician

• Permian

• Cambrian

During which period did the Acadian Orogeny occur?

• Devonian

• Cretaceous

• Permina

• Precambrian

Which of the following geologic event occurred last?

• Tilting of the layers

• Deposition of Layer A

• The faulting (line E)

• Igneous intrusion K

What geologic event occurred most recently?

• Unconformity S

• Fault L

• Fault M

• Deposition of Layer J

Which is the best index fossil?

• Trilobite

• Crinoind

• Gastropod

• Ammonite

Which law does the go with "The present is the key to the past?"

• Superposition

• Uniformitarianism

• Law of Original Horizontality

• Law of cross-cutting

A buried erosional surface is called a(n):

• Orogeny

• Unconformity

• Subduction

• Intrusion

Volcanic ash is a good time marker because

• it creates an unconformity

• it has a dark color

• can be dated using U-238

• was rapidly deposited

Brachiopods and Gastropods found in rock layers indicated that the environment of formation was

• in a shallow sea

• in a desert between two mountains

• in a lava flow

• by a glacier