The figure below shows the Ogallala and Dakota 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 shale and sandstone layers are most likely a result of transgression and regression. This occurs when sea levels rise and fall, causing alternating layers of sedimentation to occur. Shale is usually deposited in deeper water, while sandstone is deposited in shallower water. Therefore, as sea levels rise and fall, the depositional environment changes, resulting in alternating layers of shale and sandstone.

The Figure Below Shows the Ogallala and Dakota Aquifers Along