Answer:
Quartz is not pure in this rock.
Explanation:
When quartz shows effervescence in contact with an acid, it means that it is not in its pure state, but rather related to other substances that may be cementing the quartz. This effectiveness is caused by substances that do not react like quartz, such as calcite.
In this case, we can conclude that in relation to the calcium-rich rock shown in the question above, the calcium is not pure, but it is likely to be related to calcite, or other material that does not react to acid.
Answer:
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Answer:
In Geology rocks that are older are usually the oldest near the bottom
Explanation:
The capital city of Costa Rica is San Jose.
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A full circle shares a value of 360°... one angel we know is 140° and the other is 90° so we can make an equation like: 140+90+a=360. the answer would be 130°