Author Question: You are studying an outcrop where the base layer is limestone and the layer directly on top of that ... (Read 134 times)

BRWH · **on:** Jul 16, 2018

You are studying an outcrop where the base layer is limestone and the layer directly on top of that is sandstone. Near the base of the sandstone are small, weathered pieces of limestone entirely contained within the sandstone.

Explain how these pieces of limestone came to be contained within the sandstone.
What will be an ideal response?

Question 2

A basalt dike is found in a body of granite. Which is older and why?

What will be an ideal response?

aburgess · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

Answer: The limestone was exposed at the surface for a long time, which weathered the surface of the limestone to create larger pieces of it. When the sandstone was deposited, these pieces were included among the sands.

Answer to Question 2

Answer: The granite is older according to the principle of cross-cutting relationships