The figure below shows the Dakota and Ogallala aquifers along with interlayered shale deposits.What likely occurred in the area to produce the alternating shale and sandstone layers?

Question

Quizplus · Accepted Answer

The alternating layers of shale and sandstone likely resulted from the cyclical process of transgression and regression, which occurred over a long period of time. During transgression, sea levels rise, leading to deposition of shale in deeper water, while during regression, sea levels fall, and sandstone is deposited in shallower water. The interlayered shale deposits were likely formed during periods of transgression, while the sandstone layers were formed during periods of regression.

The Figure Below Shows the Dakota and Ogallala Aquifers Along