Uniform Variable Symmetrical Asymmetrical
uniform age clip variable age clip symmetrical elevation clip asymmetrical elevation clip
Age of the seafloor is uniform (red = youngest, orange = older) along the length of this boundary. Age of the seafloor is variable (orange = younger, yellow = older) along the length of this boundary. Elevation of the seafloor is higher (light blue) along this boundary and deeper (purple) away on both sides. Elevation is higher on the eastern (right-hand) side of the boundary than on the western (left-hand) side.