Question

which rock feature is the line running between points a and b most likely to be? a. rock strata b. sill c. dike d. fault

Explanation:

To determine the rock feature between A and B, we analyze each option:

• Option A (rock strata): Rock strata are layers of sedimentary rock, typically horizontal or gently inclined. The line between A and B is not a layer but a fracture or intrusion, so A is incorrect.
• Option B (sill): A sill is a horizontal igneous intrusion between rock layers. The line between A and B appears vertical or steeply inclined, not horizontal, so B is incorrect.
• Option C (dike): A dike is a vertical or steeply inclined igneous intrusion that cuts across rock layers. The line between A and B aligns with the characteristics of a dike (cutting across layers), making C a strong candidate.
• Option D (fault): A fault is a fracture where rock masses have moved relative to each other. The image does not show evidence of displacement (e.g., offset layers), so D is incorrect.

Answer:

C. dike