isocline (thing)

Geometry

The geometric interpretation of isocline is any line indicating a constant value in a two-dimensional field. Typical examples include isobars and isotherms on a weather map, and topographic lines on a topo map.

Geology

A geologic fold, either syncline or anticline, which is so tightly folded around the fold axis that the limbs of the fold have identical strike and dip.

            ||*||            \\    *    //
            ||*||             \\   *   //
            ||*||              \\  *  //
            ||*||               \\ * //
            ||*||                \\*//
            |\*/|                 \*/
             \*/                   *
              *                    *

        Isoclinal fold       standard fold

(* = fold axis)