Question

task: geologic history
activity 2 of 3
geologic cross sections give scientists information about the geologic history of an area. use the geologic cross section below to answer the following questions.
according to the diagram, which rock layer is most likely the oldest?
a. layer a
b. layer b
c. layer c
d. layer d

Explanation:

According to the principle of superposition in geology, in undisturbed sedimentary rock layers, the oldest layer is at the bottom. Here, we assume the cross - section represents sedimentary layers (common in such problems). Layer C is at the lowest position among the options (assuming the diagram's layering).

Answer:

C. Layer C