In structural geology, an anticline's a fold that's convex up and has its oldest beds at its core. The term isn't to be confused with antiform, which's a purely descriptive term for any fold that's convex up. Therefore if age relationships (for example younging direction) between various strata are unknown, the term antiform must be used. On a geologic map, anticlines are usually recognized by a sequence of rock layers that're progressively older toward the center of the fold because the uplif… (More on Anticline)