Further west on the road, heading deeper into the canyon, there are rocks with alternating light and

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Question:

Further west on the road, heading deeper into the canyon, there are rocks with alternating light and dark bands.

The lighter bands consist of mineral A that is clear or whitish in color, hard, and does not react to acid.

The dark color bands are made of mineral B that is black or dark green in color, rectangular in shape (long compared to their width) and is a silicate that cleaves in a non-perpendicular way

1. What is Mineral A in this sample?

2. What is Mineral B in this sample?

3 What is the name of this rock?

4. How did this sample form? Be sure to refer to the directions to ensure that all information is included for a complete answer and keep your answer to three sentences or less.