Which mountain range divides Antarctica into eastern and western regions?

The Transantarctic Mountains divide Antarctica into eastern and western regions.

The range extends across the continent from the coast of the Ross Sea toward the Weddell Sea. It separates the larger East Antarctic Ice Sheet from the West Antarctic Ice Sheet and forms one of the world’s longest mountain systems.

The Transantarctic Mountains are not a single continuous wall of exposed rock. Ice covers much of the range, while exposed peaks and valleys appear in places such as the McMurdo Dry Valleys. Mount Kirkpatrick, at 4,528 metres, is among the range’s highest summits.

The mountains are geologically older than many famous fold ranges and include sedimentary, metamorphic, and volcanic rocks. The Royal Society Range and Queen Alexandra Range are subdivisions within the broader system. Explorers of the Heroic Age of Antarctic Exploration used several passes and valleys through this mountain barrier.