Deccan Plateau — South-Central Indian Upland

Geography and extent

The plateau covers a large portion of the Indian subcontinent and extends over eight Indian states, principally Telangana, Maharashtra, Andhra Pradesh, Karnataka, Kerala and Tamil Nadu. Its upland forms a triangle whose southern vertex points toward the tip of the peninsula. The plateau's elevation varies: the southern portion is generally higher, often exceeding levels described at higher altitudes, while northern areas are lower and merge into broad plains. The upland’s interior contains many different habitats and local landforms.

Geology and origin

The Deccan Plateau is underlain by extensive volcanic basalt known collectively as the Deccan Traps, produced by massive lava flows late in the Mesozoic to early Cenozoic eras. This volcanic foundation shapes the region's soils and drainage and contributes to its characteristic flat-topped hills and step-like escarpments. The plateau's overall geology and internal relief create varied substrata and mineral deposits that have influenced human settlement and land use over millennia. For geological context see the notes on geology.

Ecology and climate

The Deccan hosts a mosaic of ecosystems ranging from dry deciduous forests and scrub to pockets of moist evergreen forest in the adjacent hills. These ecosystems reflect gradients in rainfall and temperature; the region’s climate varies from semi-arid interiors to wetter western and southern slopes. The Western and Eastern Ghats that flank the plateau are important for rainfall capture and biodiversity: the Western slopes uplifted as the mountain ranges on the west and the Eastern Ghats on the east create rain shadows and biological corridors. Many forest types on the plateau are very old compared with younger mountain systems.

Rivers, resources and human use

Major rivers that drain the plateau create fertile valleys and support irrigation and agriculture. The plateau’s soils and flat uplands favor a mix of dry-farming crops and irrigated agriculture fed by rivers and reservoirs. Urban centres and historic cities are scattered across the upland and draw on its mineral, agricultural and water resources. Human activities have shaped landscape patches, while the northern rim formed by the Satpura and Vindhya ranges separates the Deccan from the densely farmed riverine plains to the north.

Distinctive features and significance

Key features of the Deccan Plateau include its triangular form, widespread volcanic bedrock, varied elevations and a large range of habitats. The plateau has been a major theatre for cultural and economic development in peninsular India and remains important for biodiversity, agriculture, mineral wealth and urban growth. For introductory resources and regional outlines consult general references and illustrated maps linked above for further orientation.

• Major characteristics: broad basaltic upland, diverse habitats, variable climate.
• Boundaries: mountain ranges including the Eastern Ghats and western escarpments, and northern ranges such as the Satpura Range.
• Administrative extent: spans several states including Telangana, Maharashtra, Andhra Pradesh, Karnataka, Kerala, Tamil Nadu.

For mapping, ecological inventories and geological summaries consult the resources indicated by the embedded links above: they provide accessible starting points to explore the plateau’s physical form, biological richness and human dimensions.