The top surface of the cap shows typical concentric zones of different colours.

The area affected by the blast can be subdivided into three roughly concentric zones:

There are often concentric zones of both color and texture.

Stations are in six concentric zones numbered 1-6.

The concentric zones can have a variety of colors - ranging from yellowish red to a dark brown.

Four concentric zones of activity must be stably established around the Moby.

The decoration, which was worked by chasing from the front, is in three concentric zones.

Many subsequent and current models use variations on these rules, often implementing them by means of concentric "zones" around each animal.

Sometimes the universal veil breaks up into concentric zones over the lower third of the stem.

The area consists of three concentric zones cut by the River Skell flowing from west to east across the site.