Q9.Why are the world’s fold mountain systems located along the margins of continents? Bring out the association between the global distribution of fold mountains and the earthquakes and volcanoes.

The global distribution of fold mountain systems is intrinsically linked to plate tectonics.

Location and Formation of Fold Mountains

Fold mountains primarily form at convergent plate boundaries where tectonic plates collide. Continental margins are zones of intense interaction, particularly ocean-continent or continent-continent convergence. Subduction of an oceanic plate beneath a continent, or collision of two continental plates, generates immense compressional forces, leading to folding and faulting of crustal material into mountain ranges.

Association with Earthquakes and Volcanoes

Earthquakes are highly concentrated along these convergent boundaries due to friction, stress accumulation, and sudden energy release from grinding or subducting plates. Volcanoes are common at ocean-continent convergent boundaries where the subducting oceanic plate melts, and magma rises to the surface, forming volcanic arcs parallel to the mountain ranges.

This unified distribution serves as compelling evidence for dynamic Plate Tectonics.