Questions: Sections 7-8
- About how long ago did the Cenozoic Era begin?
- Into what two periods is the Cenozoic Era divided?
- In which era do we now live?
- In which period do we now live?
- What kind of coal is found in North Dakota?
- What has the Cenozoic Era been called?
- Name some of the mammals that lived in North Dakota during the Tertiary Period.
- What is petrified wood really made of ?
- What is the state fossil of North Dakota?
- What are teredos?
Critical Thinking Questions
- How was the formation of coal different from the formation of petroleum and natural gas?
- Why can’t new petrified trees be planted in petrified forests?