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Name_____________________________ Section____________________

Relative Ages of Rock Layers

Directions: For each diagram below correctly list the sequence of events. Be sure to

number the layers on each diagram.

DIAGRAM A

7. _________________________________

6. _________________________________

5. _________________________________

4. _________________________________

3. _________________________________

2. _________________________________

1. _________________________________

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DIAGRAM B

9. _________________________________

8. _________________________________

7. _________________________________

6. _________________________________

5. _________________________________

4. _________________________________

3. _________________________________

2. _________________________________

1. _________________________________

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DIAGRAM C

13. ________________________________

12. ________________________________

11. ________________________________

10. ________________________________

9. _________________________________

8. _________________________________

7. _________________________________

6. _________________________________

5. _________________________________

4. _________________________________

3. _________________________________

2. _________________________________

1. _________________________________

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GEOLOGIC TIME SCALE

Use the Earth Science Reference Tables, and your knowledge of Earth Science to

answer the following questions.

1. What is the geologic time scale based on?

2. Orogeny is the process of _________________________________.

3. The Cambrian Period began at _____________ mya and ended ____________

mya.

4. Why are fossils from the Precambrian Period difficult to find?

5. The extinction of armored fish occurred _______________ mya during the ________________ Period.

6. The time span between the earliest dinosaurs and the climax of the dinosaurs is ______________________ years.

7. What era has the largest time span? ___________________________

8. During which section of time did the Hudson Highlands and Ancestral Adirondack

Mountains form? ____________________________

9. What is the New York State fossil? _____________________________

10. Trilobites are common in New York State and are found in which time periods?