What is an anti-syncline?

Answer 1

A syncline is a downward curving fold in a rock formation, where the strata dip toward the center of the structure. An anticline is an upwardly curving fold, with the strata rise upward toward the center of the structure.

Answer 2

An anticline is a fold in layers of rock that arches upward, while a syncline is a fold that bends downward. An anti-syncline is a type of fold where the rock layers are both arched upward and bent downward in the middle, creating a combination of both anticline and syncline features.