What is the name for a subsurface map whose contours show the elevation of a rock layer, making folds and faults clearly visible?

What is the name for a subsurface map whose contours show the elevation of a rock layer, making folds and faults clearly visible?

• A. Contour map
• B. Plan map
• C. Elevation map
• D. Structure map

Answer: (D)

This question tests recognizing a map that focuses on the elevation of a specific rock layer to reveal what the geology below looks like. The term for this is a structure map. By plotting the bed’s elevation at multiple points and drawing contour lines at constant elevations, you can see how the layer rises and dips underground. This makes folds (where the bed curves up or down) and faults (disruptions where the bed offsets) clearly visible on the map. It’s distinct from a general contour map, which might depict surface features, a plan map, which is simply a horizontal view, or a vague elevation map that doesn’t tie the contours to a particular subsurface layer.

This question tests recognizing a map that focuses on the elevation of a specific rock layer to reveal what the geology below looks like. The term for this is a structure map. By plotting the bed’s elevation at multiple points and drawing contour lines at constant elevations, you can see how the layer rises and dips underground. This makes folds (where the bed curves up or down) and faults (disruptions where the bed offsets) clearly visible on the map. It’s distinct from a general contour map, which might depict surface features, a plan map, which is simply a horizontal view, or a vague elevation map that doesn’t tie the contours to a particular subsurface layer.