Telangana's geological foundation – the Dharwar Craton – has travelled over 6,000 kilometres over the past 500 million years. It began as part of Gondwana in the southern hemisphere, became an isolated island continent, and eventually collided with Asia, creating the Himalayas and the Deccan Plateau. This journey is one of the most remarkable tectonic stories on Earth – and its evidence is written in the rocks beneath our feet.
The Hadean Eon – named after Hades, the Greek god of the underworld – represents Earth's earliest geological period, spanning from the planet's formation around 4.5 billion years ago to about 4.0 billion years ago. Though no rocks survive from this time, it was a period of extreme conditions that set the stage for everything that followed.
During the Hadean, Earth was a volatile, molten world – a stark contrast to the blue planet we know today. The surface was covered with oceans of lava, the atmosphere was toxic, and the planet was constantly bombarded by asteroids and comets. Yet out of this chaos, the conditions for life were being prepared – the first oceans formed, the atmosphere began to take shape, and the ingredients for life were delivered from space.
Telangana Connection: While no rocks from the Hadean survive in Telangana, the region's geological foundation – the Dharwar Craton – has its origins in the processes that began during this eon. The granite-gneiss complexes that are exposed in Hyderabad and other parts of the state preserve evidence of the Earth's early history, including the formation of the first stable crustal blocks.
The Archean Eon spans from 4.0 to 2.5 billion years ago and represents a critical period in Earth's history. During this time, the first continents began to form, the first stable cratons (including the Dharwar Craton – the geological foundation of Telangana) stabilised, and life emerged and evolved – from simple single-celled organisms to the first oxygen-producing cyanobacteria that transformed the planet's atmosphere.
Telangana Connection: The Dharwar Craton preserves some of the oldest rocks on Earth, dating back over 3.6 billion years. While no microbial fossils have yet been discovered in Telangana's Precambrian rocks, the region's ancient rocks contain evidence of the environmental conditions that would have supported life – including banded iron formations (BIFs) that are a direct result of oxygen produced by cyanobacteria. The granite-gneiss complexes and greenstone belts of the Dharwar Craton are exposed across Telangana, preserving the region's deep geological history.
The Proterozoic Eon is the last eon of the Precambrian Super-Eon, spanning from 2.5 billion years ago to the beginning of the Phanerozoic Eon 541 million years ago. It was a time of significant geological and biological developments – the formation of the first supercontinents, the rise of oxygen in the atmosphere, and the emergence of the first complex, multicellular life.
Telangana Connection: During the Proterozoic, the Dharwar Craton was part of several supercontinents – Columbia, Rodinia, and Pannotia – before finally becoming part of Gondwana. The Eastern Ghats Mobile Belt formed along the eastern margin of Telangana, and the Godavari and Krishna grabens – rift valleys that would later become important for coal and diamond exploration – began to take shape. The region moved from the equator in Rodinia to the southern hemisphere in Gondwana, a journey of thousands of kilometres.
The Phanerozoic Eon – meaning "visible life" – is the current eon in Earth's geological history, spanning from 541 million years ago to the present. It is the eon during which abundant animal and plant life has existed, and it is the time when the Earth's modern landscapes, including the Deccan Plateau, took their present form.
Telangana Connection: For Telangana, the Phanerozoic Eon represents the time when the region's ancient Dharwar basement was overlain by sedimentary basins, volcanic traps, and river systems. India's journey from Gondwana to Asia – a northward drift of over 6,000 kilometres – shaped the region's geology and landscape. The Deccan Traps erupted around 66 million years ago, covering parts of Telangana with basalt and creating the black cotton soils. The collision with Asia uplifted the Deccan Plateau, and the Godavari and Krishna rivers established their modern courses.
Chronological Summary
- c. 13.8 Billion Years Ago: Big Bang – universe formation; space, time, and matter created.
- c. 13.8–4.6 Billion Years Ago: Formation of galaxies, stars, and supernovae – elements forged.
- c. 4.6 Billion Years Ago: Solar system forms from the solar nebula.
- c. 4.5 Billion Years Ago: Earth formed through accretion; giant impact with Theia creates the Moon; differentiation into core, mantle, crust; oceans formed.
- c. 4.5–4.0 Billion Years Ago: Hadean Eon – molten Earth, intense volcanism, Late Heavy Bombardment, no continents yet, first atmosphere and oceans form.
- c. 4.0–2.5 Billion Years Ago: Archean Eon – first continents form; Dharwar Craton begins to stabilise; first microbial life (cyanobacteria) appears; Great Oxidation Event begins.
- c. 3.6–2.5 Billion Years Ago: Dharwar Craton (foundation of Telangana) forms – located near the equator, part of a cluster of small cratons including Bastar and Singhbhum.
- c. 2.8–2.5 Billion Years Ago: Dharwar Craton stabilised – geological foundation of Telangana and the Deccan Plateau; collides with Bastar and Singhbhum cratons.
- c. 2.5–1.8 Billion Years Ago: Supercontinent Columbia (Nuna) assembles, including the Dharwar Craton.
- c. 2.5–1.6 Billion Years Ago: Eastern Ghats Mobile Belt formation; khondalites and charnockites formed deep in the Earth's crust.
- c. 1.8–1.3 Billion Years Ago: Columbia breaks apart; rifting creates grabens and sedimentary basins.
- c. 1.6–0.8 Billion Years Ago: Godavari and Krishna grabens formed; sedimentary basins deposited, later important for coal and diamond exploration.
- c. 1.3–1.0 Billion Years Ago: Continental rifting continues; Dharwar Craton separated from other landmasses.
- c. 1.0 Billion Years Ago: Supercontinent Rodinia assembles – includes nearly all continental crust; Dharwar Craton located near the equator; surrounded by Mirovia Ocean.
- c. 750–633 Million Years Ago: Rodinia breaks apart; Mozambique Ocean opens between India and East Africa; Dharwar Craton separates from other landmasses.
- c. 750–580 Million Years Ago: Snowball Earth events – periods of extreme glaciation when ice covered much of the planet.
- c. 633–541 Million Years Ago: Supercontinent Pannotia forms – short-lived landmass in the southern hemisphere; Dharwar Craton part of this supercontinent.
- c. 600–541 Million Years Ago: Ediacaran Period – first complex multicellular life (Ediacaran biota) appears; forerunners of the Cambrian explosion.
- c. 600–541 Million Years Ago: Supercontinent Gondwana begins to assemble; India (including Dharwar Craton) becomes part of Gondwana.
- c. 541 Million Years Ago: Phanerozoic Eon begins; Cambrian explosion of complex life; Gondwana located in the southern hemisphere.
- c. 541–299 Million Years Ago: Paleozoic Era – fish, amphibians, reptiles evolve; Gondwana remains in the southern hemisphere.
- c. 359–299 Million Years Ago: Carboniferous Period – coal forests; giant insects; first reptiles; continents begin to converge toward Pangea.
- c. 299–252 Million Years Ago: Permian Period – supercontinent Pangea fully assembled; India (including Telangana) part of Pangea in the southern hemisphere; Godavari Valley Coalfields begin to form.
- c. 252 Million Years Ago: Permian-Triassic extinction ("Great Dying") – wipes out ~90% of all species; Paleozoic Era ends.
- c. 252–200 Million Years Ago: Triassic Period – first dinosaurs; Pangea begins to break apart; India remains part of Gondwana.
- c. 200–150 Million Years Ago: Jurassic Period – Pangea fully breaks apart; India separates from Gondwana and becomes an island continent; begins northward journey across Tethys Ocean.
- c. 165 Million Years Ago: Kotasaurus and Barapasaurus dinosaurs roam the floodplains of present-day Telangana.
- c. 150–100 Million Years Ago: Cretaceous Period – India continues northward drift at 5–15 cm/year; isolated island continent with unique flora and fauna.
- c. 66 Million Years Ago: Deccan Traps eruptions – massive lava flows cover parts of Telangana; asteroid impact; extinction of non-avian dinosaurs; India collides with Asia; Mesozoic Era ends.
- c. 66–50 Million Years Ago: Paleogene Period – India collides with Asia; Himalayas form; Deccan Plateau uplifted; modern landscape of Telangana begins to take shape.
- c. 50 Million Years Ago – Present: Neogene and Quaternary Periods – Deccan Plateau continues to erode; Godavari and Krishna rivers establish modern courses; black cotton soils form; hominids and modern humans emerge.
- c. 2 Million Years Ago – Present: Hominids and modern humans emerge; Telangana's historic period begins.
- Geological Survey of India (GSI) – Dharwar Craton reports
- R. D. Gaur – Geology of India
- J. J. W. Rogers & S. M. Naqvi – "Precambrian Geology of India" (1987)
- Telangana State Remote Sensing Centre – geological mapping
- Bhimbetka, Vindhyan, Chitradurga – fossil studies
- J. W. Schopf – Cradle of Life: The Discovery of Earth's Earliest Fossils
- Current Science – Deccan Traps studies and mass extinction research
The story of Telangana did not begin with the Satavahanas or the Kakatiyas. It began billions of years earlier, when the Dharwar Craton cooled, when the first microbes oxygenated the air, and when the Deccan Plateau rose from ancient seas. Understanding this deep history gives us a new appreciation for the landscapes, soils, minerals, and water systems that made human civilisation possible in this region. The search for Telangana's earliest fossils continues – a reminder that our written history is only the last chapter of an epic geological saga.