Answer :
Final answer:
The correct answer is A) Kaibab Limestone; Toroweap Formation, as these are the two caprocks that form cliffs in the Grand Canyon with Kaibab Limestone being the outermost layer followed by the Toroweap Formation underneath it.
Explanation:
The Kaibab Limestone and the Toroweap Formation are two examples of caprocks forming cliffs in the Grand Canyon. On the geologic map of the Grand Canyon, the Kaibab Limestone is the outermost layer covering the surface of the region. Directly below the Kaibab, descending some steep topographic steps, is a very thin rock unit known as the Toroweap Formation, located just above another unit, the Coconino Sandstone. These rock layers are positioned in a vertical stack with the Kaibab Limestone at the top, followed by the Toroweap Formation, and then the Coconino Sandstone beneath them. The correct answer to the question is A) Kaibab Limestone; Toroweap Formation.
The correct answer is C) Kaibab Limestone ; Hermit Shale. The Kaibab Limestone and the Hermit Shale are two examples of caprocks forming cliffs in the Grand Canyon.
In the Grand Canyon, there are two examples of caprocks forming cliffs: the Kaibab Limestone and the Hermit Shale. The Kaibab Limestone is the uppermost layer of rock in the canyon and forms a resistant caprock that helps protect the underlying layers from erosion. The Hermit Shale is a softer layer of rock that underlies the Kaibab Limestone and is also a caprock that contributes to the formation of cliffs in the Grand Canyon.
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