Question

Base your answers to questions 80 through 82 on the generalized cross section of the Grand Canyon

represented below and on your knowledge of Earth science. Some rock layers have been labeled. The rock layers
have not been overturned.

Describe how the calcite that composes the Redwall limestone can be distinguished from the quartz that composes the Tapeats sandstone.

Answer 1

There are a lot of possible answers for this questions. The calcite that composes the Redwall limestone can be distinguished from the quartz that composes the Tapeats sandstone: (1) Calcite bubbles with acid. (2) Calcite shows cleavage. (3) Quartz is harder than calcite. (4) Calcite is composed of calcium (Ca), oxygen (O), and carbon (C), and quartz is composed of silicon (Si) and oxygen (O).

Answer 2

There are several ways to describe how the calcite that composes the Redwall limestone can be distinguished from the quartz that composes the Tapeats sandstone. Some ways are calcite bubbles with acid, calcite shows cleavage, and quartz is harder than calcite.