Central Highlands
Introduction
The Central Highlands constitute the northernmost division of the Peninsular Plateau, lying north of the Narmada River and the Vindhyan escarpment. This extensive triangular upland region, covering parts of Rajasthan, Madhya Pradesh, Gujarat, and Uttar Pradesh, represents an ancient peneplain that has undergone periodic uplift, subsidence, and erosion. The region is bounded by the Aravalli Range in the west-northwest, the Vindhyan scarp in the south, the Bundelkhand upland in the east, and merges with the Gangetic plains in the north. Its average elevation ranges from 300 to 800 meters with a general eastward slope.
The Aravalli Range
The Aravalli Range is one of the world’s oldest fold mountain systems, dating from the Precambrian era (approximately 2.5 billion years before present). Extending approximately 692 km from Delhi southwestward through Rajasthan to the Gujarat border near Palanpur, the Aravallis form the relict of an ancient orogen that has been reduced by hundreds of millions of years of erosion. The highest peak, Guru Shikhar (1,722 m) near Mount Abu in Rajasthan, represents an erosion-resistant granite-gneiss intrusion.
The Aravallis serve as the climatic and hydrological divide between the semi-arid western Rajasthan (Thar Desert) to the west and the more humid Gangetic drainage to the east. The range intercepts monsoon winds, producing a modest orographic rainfall effect on the eastern slopes and contributing to the aridity of the Thar Desert in its rain shadow. Historically forested, the Aravallis have experienced severe deforestation, and the range now plays a crucial role in the groundwater recharge of the Rajasthan plains.
Geologically, the Aravallis comprise the Banded Gneissic Complex (the Archean basement), the Aravalli Supergroup (lower Proterozoic metasediments including the commercially mined marble and mica schists), and the Delhi Supergroup (middle Proterozoic metasediments). Rich deposits of lead-zinc (Zawar mines), marble (Makrana — source of the white marble used in the Taj Mahal), and mica are found here. The Sambhar Salt Lake, India’s largest inland salt lake (approximately 190-230 square kilometers seasonally), lies in a structural depression within the Aravalli system.
The Malwa Plateau
The Malwa Plateau occupies the western portion of the Central Highlands in western Madhya Pradesh and southeastern Rajasthan. This lava plateau, capped primarily by Deccan Trap basalts, has an average elevation of 500-600 meters and is drained by the Chambal River and its tributaries (the Banas, Kali Sindh, and Parbati) flowing northeastward to join the Yamuna-Ganga system. Despite its elevation, the plateau exhibits a gently undulating topography due to prolonged subaerial denudation.
The Malwa region is characterized by its rich black cotton soil (regur), derived from weathered Deccan basalt, which supports extensive cotton, soybean, and wheat cultivation. The plateau is a significant producer of opium (legally grown for pharmaceutical purposes under government regulation) and soybean (Malwa contributes approximately 60% of India’s soybean production). The cities of Indore (the commercial capital of Madhya Pradesh), Ujjain (one of India’s ancient cities and a major pilgrimage center), and Gwalior are located in this region.
The Chambal badlands — an extensive ravine system carved by the Chambal and its tributaries into the alluvium and weathered basalt of the plateau margins — represent one of the most spectacular fluvial erosion landscapes in the world. These ravines (beehad), extending up to 100 meters in depth and covering approximately 5,000 square kilometers, have historically harbored dacoit activity and are now the focus of watershed development and rehabilitation programs.
The Bundelkhand Upland
Lying in central Uttar Pradesh and northern Madhya Pradesh between the Yamuna River in the north and the Vindhyan scarp in the south, the Bundelkhand Upland is composed predominantly of ancient Archean granite-gneiss with Proterozoic Vindhyan sedimentary outliers. The region has an average elevation of 300-450 meters with isolated residual hills rising to 600 meters. Bounded by the Betwa and Ken rivers in the west and east respectively, and dissected by the Tons and Dhasan rivers, the upland slopes gently northeastward toward the Yamuna.
Bundelkhand faces chronic water scarcity due to the impermeable granitic substrate, limited surface drainage, and the absence of significant aquifers. The Ken-Betwa River Interlinking Project, aiming to transfer surplus water from the Ken River (a Yamuna tributary) to the Betwa basin, is designed partly to address this deficit, though it has raised significant environmental concerns regarding the submergence of Panna Tiger Reserve habitat.
The historical town of Khajuraho, with its UNESCO World Heritage-listed temple complex, is located on the eastern edge of the Bundelkhand region. Jhansi represents the principal urban center, while diamond deposits have historically been mined from the Panna region.
The Baghelkhand Region
Baghelkhand occupies the eastern extremity of the Central Highlands in eastern Madhya Pradesh, bounded by the Son River in the north, the Maikal Range in the south, and the Chota Nagpur Plateau in the east. The region comprises Archaean crystalline rocks with Vindhyan sedimentary covers and Gondwana sedimentary basins containing significant coal deposits. The Son River and its tributaries drain the region eastward to join the Ganga system. The Kaimur Range, forming the Vindhyan escarpment in this area, overlooks the Son valley with impressive sandstone cliffs.
Significant mineral resources of the region include limestone and dolomite used in the cement industries concentrated in the Katni-Satna-Rewa belt. The rivers of Baghelkhand have several waterfalls — notably the Keoti Falls and Bahuti Falls — formed where the rivers descend over Vindhyan sandstone scarps. Amarkantak, on the Maikal Range at the tri-junction of the Vindhya-Satpura-Maikal ranges, is the sacred source of the Narmada River and marks a cultural landscape of importance.