Indo-Burman Ranges

The Indo-Burman Ranges (IBR), also known as the Indo-Myanmar Ranges, is a mountain chain that forms the boundary between the Indian subcontinent and the Indochinese peninsula. This geological feature sits at the convergent boundary of the Indian Plate and the Burma Plate. The Indo-Burman Range merged with Eastern Himalayan Syntaxis further north, submerged into the Andaman Sea, and resurfaced as Andaman Islands further south.

The mountain belt comprises the following ranges from north to south: the Patkai Bum, the Naga Hills, the Mikir Hills, the Mizo Hills and the Arakan Mountains. The first four are often grouped into the Purvanchal Range, and comprise the northern half of the Indo-Burman mountain system.