The Formation of the Grand Canyon Layers

When did the dike form?

A) after erosion revealed the canyon wall

B) at the same time as the sandstone formed and the canyon was eroded

C) after the sandstone formed and before erosion revealed the canyon wall

D) before the sandstone formed

Answer:

I think the answer is: C) after the sandstone formed and before erosion revealed the canyon wall.

In the geological formation of the Grand Canyon, the layers of sandstone play a significant role. These layers were formed over millions of years through various geological processes. One interesting feature found in the Grand Canyon's walls is a dike, which cuts across some of the layers.

A dike is a sheet of rocks that cuts across the layers in the fracture of a pre-existing rock's body. This dike was formed after the sandstone layers had already formed but before erosion revealed the canyon wall. This occurrence is a perfect example of geological processes shaping the Earth's landscape over time.

The layers of sandstone in the Grand Canyon provide a glimpse into the Earth's history and the processes that have shaped our planet. By studying these layers, scientists can unravel the story of how the Grand Canyon was formed and the forces that have influenced its unique geological features.