contour map
contour map
A map showing by contours (or contour lines) topographic, or structural, or thickness, or facies differences in the area mapped
A map that portrays surface configuration by means of contour lines; esp. a topographic map that shows surface relief by means of contour lines drawn at regular intervals above mean sea level, or a structure-contour map that shows the configuration of a specified rock surface underground and the inferred configuration of that surface where it has been removed by erosion.