1. a downward fold in rock layers where the youngest rocks are at the center
Usage: geology

Examples

• The geologist identified a large syncline in the exposed rock face.
• Oil and gas often accumulate in the troughs of synclines.
• The valley was formed by erosion along a syncline axis.
• Students learned to distinguish between synclines and anticlines in their geology class.
• The syncline contained sedimentary rocks dating back millions of years.
• Mining operations often target synclines where coal seams are preserved.