Which rock layer is the oldest and why?

Geologic History Unit Assessment, Part 2
Hermit Shale because shale is the oldest type of rock

A.
Tapeats Sandstone because it is the bottom layer

B.
Redwall Limestone because limestone is older than shale

C.
Kaibab Limestone because it is the topmost layer

D.

Question

Which rock layer is the oldest and why?
 
  Geologic History Unit Assessment, Part 2     
Hermit Shale because shale is the oldest type of rock
 
 A.
Tapeats Sandstone because it is the bottom layer
 
 B.
Redwall Limestone because limestone is older than shale
 
 C.
Kaibab Limestone because it is the topmost layer
 
 D.

anonymous · Answer

This is D. Kaibab Limestone because it is the topmost layer

anonymous · Answer

https://static.k12.com/calms_media/media/1020500_1021000/1020876/4/9b58164be16dd3cb0ddee47f2bc03a737a6cb53a/MS2_ERT_03_09_UAS.jpg