Question

activity 3 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.
which statement best describes the relative age of layer d?
a. layer d is older than layer c.
b. layer d is younger than layer c.
c. layer d is older than layer b.
d. layer d is the same age as the fault at e.

Explanation:

According to the principle of cross - cutting relationships in geology, a geological feature (such as a rock layer or fault) that cuts through another is younger than the feature it cuts. Layer D cuts through Layer C, so Layer D is younger than Layer C. Layer D is younger than Layer B as well (since it cuts through B). And the fault at E cuts through Layer D, so they are not the same age.

Answer:

B. Layer D is younger than Layer C.