Meghalaya Plateau

Meghalaya Plateau
Name	Meghalaya Plateau
Other names	Shillong Plateau
Location	India; Northeast India
States	Meghalaya, Assam, Bangladesh
Highest point	Shillong Peak
Area km2	22500

Meghalaya Plateau is an upland region in Northeast India forming a major physiographic unit adjoining the Indo-Gangetic Plain and the Brahmaputra Valley. The plateau includes the Shillong Plateau and extends toward the Garo Hills and Jaintia Hills, serving as a watershed between the Brahmaputra River and the Meghna River. It has played roles in colonial boundary decisions such as the Treaty of Yandabo-era rearrangements and in postcolonial state formation involving Assam and Meghalaya (state).

Etymology and naming

The name derives from the Meghalaya (state) designation coined after Indian independence, combining Megha (Sanskrit for cloud) and Alaya (abode) following proposals in the States Reorganisation Act, 1956 era and discussions in the Shillong Municipal Board and All Party Hill Leaders' Conference. Historical nomenclature appears in records of the East India Company and in publications by the Survey of India and explorers like Nicolas Trubetzkoy and administrators such as Sir John McPherson.

Geography and boundaries

The plateau occupies southern Assam and central Meghalaya (state), bordering Bangladesh’s Sylhet Division and adjoining the Indian subcontinent physiographic provinces. Major towns include Shillong, Tura, Jowai, Nongpoh, and Williamnagar. It rises from the floodplain of the Brahmaputra River and merges with the Chotanagpur Plateau-fringe via hill tracts; nearby geographic features include the Patkai Range, Mizo Hills, and the Himalayan foothills. Administrative boundaries implicated historical events like the Partition of India and the Sylhet referendum.

Geology and geomorphology

Geologically the region consists of Precambrian to Mesozoic sedimentary sequences overlying crystalline basement, recorded in studies by the Geological Survey of India and researchers at Indian Institute of Technology Guwahati and NEHU (North-Eastern Hill University). Lithologies include limestone of the Sylhet Limestone group, sandstone of the Surma Group, and associated shale and conglomerate units, with karst development in the Jaintia Hills. Structural features reflect the Indian Plate collision history with remnants of the Tethys Ocean recorded in fossils and invertebrate assemblages studied by institutions like Zoological Survey of India. Morphology comprises dissected tablelands, escarpments at Shillong Peak, and river-incised valleys associated with the Umiam Lake basin and the Dawki gorge.

Climate and hydrology

The plateau is subject to the Southwest Monsoon and receives some of the highest rainfall totals globally at sites linked to Cherrapunji and Mawsynram, phenomena documented by the India Meteorological Department and climatologists at IIT Delhi. Rivers draining the plateau include the Umiam River, Myntdu River, Kynshi River, and tributaries of the Surma–Meghna system; hydrological infrastructure includes the Umiam Lake reservoir and hydropower projects by National Thermal Power Corporation affiliates and state utilities. Extreme precipitation events have links to atmospheric patterns studied by the Indian Space Research Organisation and regional climate models from ICIMOD.

Flora and fauna

Vegetation ranges from tropical semi-evergreen and moist deciduous forests to montane grasslands, with biodiversity inventories by the Botanical Survey of India, Indian Council of Forestry Research and Education, and conservation NGOs like World Wide Fund for Nature and Conservation International. Endemic and notable taxa occur including species studied at Prince of Wales Museum collections and at the Shillong College Herbarium; mammalian fauna includes clouded leopard records, bengal tiger sightings in fringe forests, and populations of Asian elephant in connected corridors. Avifauna documented by the Bombay Natural History Society and BirdLife International includes species such as the black-throated thrush and montane specialists; karst cave systems host unique troglobitic fauna surveyed by ZSI teams and speleologists from National Cave Research and Protection Organisation.

Human settlement and culture

The plateau is home to indigenous groups including the Khasis, Garos, and Jaintias, with matrilineal customs and cultural institutions such as the Nongkrem Dance festivals, documented by anthropologists at SOAS University of London and Smithsonian Institution collaborations. Colonial-era missions like the Santal Mission and administrations such as the British Raj shaped settlement patterns; cultural centers include the Shillong Science Centre and Don Bosco Museum. Languages include Khasi language, Garo language, and Pnar language, and religious influences include Christianity in Northeast India and local syncretic practices studied by the Anthropological Survey of India.

Economy and land use

Land use comprises agriculture—rice terraces, areca nut plantations, and orange orchards—alongside forestry, extractive limestone mining in the Jaintia and Garo areas, and tourism centered on sites like Cherrapunji and Mawlynnong. Economic activity is connected to infrastructure such as the NH44 (India) corridor, regional railheads at Guwahati and Lumding, and markets in Shillong and Tura. Development projects and conservation tensions involve agencies like the Ministry of Environment, Forest and Climate Change and funding from multilateral lenders including the Asian Development Bank and World Bank in initiatives spanning watershed management and rural livelihoods.

Category:Plateaus of India Category:Geography of Meghalaya Category:Landforms of Assam