1. Which layer is the youngest?
2. Which layer is the oldest?
3. Which layer is older, layer F or fault B? 4. Is layer D older than the fault E?
5. Arrange the layers and faults from oldest to youngest.
B
F
E
6. Which is the most recent layer on site 2? 7. What are the fossils present in layer F?
8. Which is older, layer Y or intrusion V?
9. Which organism(s) can be considered as index fossils?
Key
Trilobite
Bird
Fish
Shell
Dinosaur
Plant
Site 1
Ammonite
C
Mammal
Extrusion
(lava)
Intrusion
Site 2
10. Why do you think there are no available fossils in layers C and E?
Share
Answer:
1. Layer B is the youngest.
2. Layer F is the oldest.
3. Layer F is older than fault B.
4. It cannot be determined based on the information given.
5. From oldest to youngest: Layer F, Fault B, Layer E, Layer B, Layer Y, Layer C, Intrusion V.
6. Layer Y is the most recent layer on site 2.
7. The fossils present in layer F are Ammonites.
8. Layer Y is older than intrusion V.
9. Trilobites can be considered as index fossils.
10. There may be no available fossils in layers C and E because the layers may have been eroded over time or the conditions may not have been conducive to fossil formation.