When a stone is trimmed by a mason and exposed to the elements, a coating of clay and other minerals, called rock var...

Tyler808 on October 7, 2022

These kinds of passages tends to be the most boring and abstract

Not getting the stimulus one bit. Makes 0 sense to me.

Replies

Create a free account to read and take part in forum discussions.

Already have an account? log in

Emil-Kunkin on December 26, 2022

Hi,

The passage tells us that rock varnish forms on a rock that has been cut. We have evidence that there is organic material trapped under the rock varnish on a rock in a given monument, and that since this organic material is old, the monument that the rock is part of must also be old.

I can think of two possible flaws here. First, it seems possible that some organic material was already on the stone before it was cut, and the rock varnish formed over that material. If this were true, the age of the material would have no bearing on the age of the monument. Second, the time the stone was cut is not necessary when the monument was built.

B is a good match for the second flaw.

Carson on August 25 at 07:50PM

Hello, could someone please fix this question? It says that Europeans arrived in the Americas in 1942 instead of 1492. A small detail but it still matters. Thank you!