The image shows sedimentary rock layers with index fossils and a fault. Rock layer diagram. 5 layers on each side of a fault. Layers 1 to 5, top to bottom on the left, layers 6 to 10, top to bottom on the right. The following pairs are the same: 1 and 8; 2 and 9; 3 and 6; 4 and 7. Layers 5 and 10 do not have matches.

Which statement accurately describes the rock layers?

Layer 8 is older than layer 1.
Layer 3 is younger than layer 6.
Layer 4 and layer 10 are the same relative age.
Layer 2 and layer 9 are the same relative age.

Faulting created the differences in layers, and layers 2 and 9 are the same age, so the correct answer is D.

Explanation: I just took the test : )

events in order:

1.       vishnu schist

2. zoroaster granite

3. bass limestone

4. hakatar   shale

5. igneous intrusion

6. shinumo quartzite

7. dox sandstone

8. tapeats limestone

9. bright angel shale

10. muav limestone

11. temple butte limestone

12. redwall limestone  

nonconformity

answer: the unkar group shows angular unconformity because the layers are turned at angle.

unconformity

answer: specifically the angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled. an angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled.

disconformity

answer: the disconformities aremarked irregular lines between the sedimentaryrocks layers.