In structural geology, a down-fold in rock strata where the youngest strata are found in the center and the limbs dip inward toward the axis is known as a:

💡 Solution & Explanation

A syncline is a downward flexure of rock strata where the youngest geological layers occupy the core and the limbs dip inward toward the central axis. Anticlines represent the exact opposite structural configuration, featuring upward arches with the oldest rocks at the center. Structural geology concepts of folds and faults are staple topics in physical geography examinations.