In structural geology, a downfolded fold in which the youngest strata are located in the core and the limbs dip inward toward the axis is termed a:

💡 Solution & Explanation

A syncline is a classic geological fold structure characterized by strata that are downfolded into a trough-like shape where the youngest rock layers occupy the innermost core. The constituent rock limbs of a syncline consistently dip inward toward the central axis or depression of the fold. In contrast, an anticline forms an arch-like structure where older strata appear at the core and limbs dip outward.