How do anticline and syncline folds differ?

An anticline is an arch-like fold which has the oldest beds at its core and the layers become younger towards the edges of the fold. A typical anticline is convex up in which the hinge or crest is where the curvature is greatest, and the limbs are the sides of the fold that dip away from the hinge, forming an upside down horseshoe shape. A syncline fold can be thought of as opposite to the anticline where its youngest beds at the core of the fold and becomes older toward the edges. A syncline fold is concave up forming an upright horseshoe shape. In a typical geological setting it would be common to see alternations of anti and syncline folds, where compressional tectonic forces create a wave like appearance in the strata. To aid in remembering how the two folds differ consider the second letter of the word:The second letter of Syncline is "y". The letter y opens upward, much like the actual fold, syncline.The second letter of anticline is "n". The letter n opens downward, much like the actual fold, anticline.