Determine the surface elevation of each borehole from the contour map.

Here's a step-by-step solution for determining the dip and strike, and then mapping the outcrops.

Part (a): Determine the dip and strike of the outcrop of the two seams.

Step 1: Determine the surface elevation of each borehole from the contour map.

• Borehole A is on the $800 \text{ m}$ contour line. Surface elevation at A = $800 \text{ m}$.
• Borehole B is on the $700 \text{ m}$ contour line. Surface elevation at B = $700 \text{ m}$.
• Borehole C is on the $600 \text{ m}$ contour line. Surface elevation at C = $600