541 Million Years Ago – Present | From Cambrian Seas to Telangana’s Prehistoric Landscapes
The Eon of Visible Life chronicles the transformation of Earth from barren landscapes to oceans teeming with life, and eventually to the first forests, mountains, and river valleys. During this Phanerozoic Eon, continents drifted across the globe, India separated from Gondwana, and Telangana’s landscapes began taking recognizable shape. Fossils of dinosaurs, ancient trees, and other early life forms, discovered in districts like Adilabad, Mulugu, and Khammam, provide glimpses into the rich prehistoric heritage of the region, setting the stage for mammals, humans, and civilizations to come.
Key Prehistoric Heritage of Telangana
One of the earliest sauropod dinosaurs discovered in India, named after the village Yamanpalli in Adilabad district. It lived during the Early Jurassic (~190 million years ago).
Fossilized wood from the Jurassic period, preserved in the Pranhita‑Godavari valley, indicating dense ancient forests.
Massive lava eruptions at the end of the Cretaceous (~66 million years ago) covered much of the Deccan, including Telangana, leaving fertile black cotton soil.
The Pranhita‑Godavari basin preserves continuous sedimentary sequences from the Triassic to the Cretaceous, making it a world‑class site for vertebrate palaeontology.
Marine life flourished – trilobites, brachiopods, and early corals. First land plants appeared, followed by insects and amphibians. By the end of the era, the supercontinent Pangea had formed.
India was part of Gondwana, located near the South Pole. Marine fossils (trilobites, brachiopods) are found in central and northern India. In Telangana, the region was a stable plateau; erosion and sedimentation shaped early basins. No definitive Paleozoic fossils have been reported from Telangana yet, but the underlying Dharwar Craton provided a stable basement.
Pangea was still intact; Telangana lay in a low‑lying basin with rivers and lakes, receiving sediments from surrounding highlands. Early dinosaurs and crocodile‑like reptiles appeared. Fossils from this period are known from the Pranhita‑Godavari valley (e.g., Alwalkeria near Adilabad).
Global: Pangea began rifting. Gondwana (India, Africa, South America, Antarctica, Australia) started to separate. Dinosaurs diversified – including giant sauropods.
Telangana Fossils:
– Kotasaurus yamanpalliensis (Adilabad): A basal sauropod dinosaur, discovered near Yamanpalli village. It is one of the most primitive sauropods known, dating to the Early Jurassic (~190 Mya). Its remains include partial skeletons, giving insights into the early evolution of long‑necked dinosaurs.
– Petrified trees (Mulugu & Khammam): Fossilised wood (gymnosperms) preserved in the Pranhita‑Godavari valley, indicating dense forests along rivers. These are often found as silicified logs, some several metres long.
Gondwana Breakup: Gondwana further broke up; India separated from Africa (~135 Mya) and from Madagascar (~90 Mya). India then drifted northward rapidly (~15–20 cm/year) toward Asia.
Telangana: The region witnessed massive volcanic activity known as the Deccan Traps (at the end of the Cretaceous). These eruptions covered large parts of Telangana and neighbouring states, leaving thick basalt layers and creating the fertile black cotton soil (regur) that defines much of the Deccan Plateau today. The eruptions coincided with the end‑Cretaceous extinction event (including non‑avian dinosaurs). While dinosaur bones are rare in the Deccan Traps, the Pranhita‑Godavari valley has yielded eggshell fragments and isolated remains.
After the dinosaur extinction, mammals diversified. India continued its northward drift and collided with Asia around 50–40 million years ago, forming the Himalayas. The Deccan Plateau was uplifted, and river systems like the Godavari and Krishna established their modern courses.
The Deccan Traps were weathered into rich black soils, supporting agriculture for millennia. Laterite and alluvial deposits formed along river valleys. By the Miocene and Pliocene, grazing mammals and early hominids appeared elsewhere in India; Telangana’s megalithic and later historical cultures emerged in the Quaternary. The modern landscape – with its granite hills, ancient cratons, and fertile river plains – is a direct inheritance from Cenozoic geological processes.
Chronological Summary of Telangana’s Phanerozoic Record
- Paleozoic (541–245 Mya): Telangana a stable plateau; marine sediments absent; Dharwar Craton remains exposed.
- Triassic (245–208 Mya): Low‑lying basin; early reptiles; fossils in Pranhita‑Godavari valley.
- Jurassic (208–146 Mya): Kotasaurus yamanpalliensis (Adilabad) – India’s earliest sauropod; petrified forests (Mulugu, Khammam).
- Cretaceous (146–66 Mya): India drifts north; Deccan Traps volcanism covers Telangana; dinosaur extinction.
- Cenozoic (66 Mya – present): India–Asia collision; Deccan soils form; modern river systems; human evolution and migration.
- Geological Survey of India (GSI) – Records on Kotasaurus yamanpalliensis
- P. M. Datta & P. J. Currie, “The sauropod dinosaur Kotasaurus yamanpalliensis from the Lower Jurassic of India”
- Telangana State Remote Sensing Centre – Deccan Traps mapping
- Annual Reports on Palaeontology – Pranhita‑Godavari valley fossils
- K. S. Valdiya, Geology of India
The Phanerozoic Eon tells the story of how Telangana’s landscapes, soils, and fossil treasures were shaped. From the marine Palaeozoic, through the Jurassic sauropods of Adilabad and the petrified forests of Mulugu, to the volcanic fury of the Deccan Traps, the region’s deep past is rich and largely unexplored. These ancient relics are a heritage that belongs not only to Telangana but to the scientific understanding of how India drifted across the globe.