Question

A rock layer contains glacial deposits and fossils of cold-adapted organisms. What can be inferred?

• A. The region was once tropical
• B. The region experienced a glacial climate
• C. The fossils were transported from another region
• D. The rock is not sedimentary

Hint:

Geological indicators of ancient glaciation include:
• Till deposits
• Moraines
• Striated rocks
• Cold-climate fossils These indicate a past glacial environment.

Answer 1

The Correct Option is B

Concept: Glacial deposits such as till, moraines, and striated rocks are evidence of the past presence of glaciers. Similarly, fossils of cold-adapted organisms indicate that the region once experienced low-temperature climatic conditions.

Step 1: Interpret the geological evidence. The presence of both glacial deposits and cold-climate fossils indicates that the area was subjected to glaciation in the past.

Step 2: Draw the correct conclusion. Hence, \[ \boxed{\text{The region experienced a glacial climate}.} \] Therefore, the correct option is \[ \boxed{(B).} \]