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In geology and earth science, a
plateau, also called a high plateau or tableland, is an
area of highland, usually consisting
of relatively flat terrain.

A highly eroded plateau is called a dissected plateau.

A volcanic
plateau is a plateau produced by volcanic activity

In structural
geology, an anticline is a fold that is convex up or to the youngest beds.

On a geologic map, anticlines are usually recognized by a sequence of rock layers that are progressively older toward the center
of the fold because the uplifted core of the fold is preferentially eroded to a
deeper stratigraphic level relative to the topographically lower flanks. The
strata dip away from
the center, or crest, of the fold.

mounds, hills, cliffs, valleys, rivers
and numerous other elements.

Oceans and continents exemplify the highest-order landforms. Landform elements are
parts of a high-order landforms that can be further identified, such as
hill-tops, shoulders and backslopes.

Very tight
folds. Formation near Moruya, New South Wales, Australia

The term fold is used in geology when one or a stack of originally flat and
planar surfaces,

• Anticline: linear, strata dip
  away from axial center, oldest strata in center.
  
• Syncline: linear, strata dip
  toward axial center, youngest strata in center.
  
• Dome:
  nonlinear, strata dip away from center in all directions, oldest strata
  in center.
  
• Basin:
  nonlinear, strata dip toward center in all directions, youngest strata in
  center.
  
• Monocline: linear, strata dip in one direction between horizontal layers on
  each side.
  
• Recumbent: linear, fold axis oriented at low angle resulting in overturned
  strata below the fold axis.
  
• Slump: typically monoclinal, result of differential compaction or
  dissolution during sedimentation and lithification.
  
• Ptygmatic: Folds are chaotic, random and disconnected. Typical of
  sedimentary slump folding, migmatites and decollement detachment zones.
  

An anticline is a fold structure in which the sides of the fold slope apart.
Its shape is concave downward. Technically, it is a fold with younger rocks on
the outside, so technically this should be called an antiform until we
can confirm the relative ages of the rocks.

plateau
(landform) -- Britannica Online Encyclopedia