Question

which of the following can be seen on a geologic map *
contour lines
strike and dip measurements
gradient of a slope
airport landing strips

Explanation:

Contour lines and slope gradients are topographic map features, while airport landing strips are on aeronautical or general reference maps. Strike and Dip measurements specifically represent the orientation of rock layers, a key feature unique to geologic maps.

Answer:

Strike and Dip measurements