A fault is characterized by which of the following relative to joints?

A fault is characterized by which of the following relative to joints?

• A. A joint displaces rocks on one side relative to another
• B. Rocks at a fault do not move
• C. A joint forms when rocks slip past each other
• D. A fault forms only underwater

Answer: (D)

The main concept being tested is that faults involve movement along a fracture, unlike joints which crack but don’t move. A fault is a fracture where rocks on one side have shifted relative to the other side, and that displacement is what defines a fault. Joints, by contrast, show no movement across the fracture. So the description that rocks on one side move relative to the other best captures what a fault is. The idea that rocks at a fault do not move contradicts the very nature of faults. The idea that a joint forms when rocks slip past each other describes movement that happens in faults, not joints. And faults aren’t limited to underwater settings; they occur on land as well.

The main concept being tested is that faults involve movement along a fracture, unlike joints which crack but don’t move. A fault is a fracture where rocks on one side have shifted relative to the other side, and that displacement is what defines a fault. Joints, by contrast, show no movement across the fracture.

So the description that rocks on one side move relative to the other best captures what a fault is. The idea that rocks at a fault do not move contradicts the very nature of faults. The idea that a joint forms when rocks slip past each other describes movement that happens in faults, not joints. And faults aren’t limited to underwater settings; they occur on land as well.