Question

If a geologist were to find a limestone deposit consisting of coral fragments, which of the following would NOT be something he or she could deduce from this discovery?

a. The area was once covered by a shallow sea.
b. The climate was tropical or subtropical.
c. The limestone formed from the accumulation of coral skeletons.
d. The presence of ancient glacial activity in the area.

Answer 1

A geologist finding limestone made of coral fragments could infer a past shallow sea and a tropical or subtropical climate, but could not deduce ancient glacial activity, as it contradicts the environmental conditions required for coral growth.

Step-by-step explanation:

If a geologist were to find a limestone deposit consisting of coral fragments, he or she could deduce several things from this discovery. However, the presence of ancient glacial activity in the area would NOT be something that could be inferred from this particular evidence.

• The area was once covered by a shallow sea, since coral reefs form in shallow, warm marine waters.
• The climate was tropical or subtropical when the limestone formed, as these are the conditions that favor coral growth.
• The limestone formed from the accumulation of coral skeletons, which are primarily composed of calcium carbonate (CaCO3).

Limestone deposits that include coral fragments suggest an environment that was conducive to coral growth, such as warm, shallow marine water. Glacial activity is associated with colder climates, which is contradictory to the evidence provided by coral limestone deposits, making it an unlikely conclusion.