What is a anicline?

An anticline is a type of geological fold that occurs when rock layers are bent upwards in an arch-like shape. This structure typically forms due to compressional forces that push the Earth's crust together. In an anticline, the oldest rock layers are found at the core or center of the fold, while younger layers are located on the flanks. Anticlines are significant in the study of geology and petroleum exploration, as they can trap hydrocarbons.