Mesozoic Era - The Age of Reptiles

During the Mesozoic Era, Earth's continents underwent major reorganisation. Pangea, assembled during the late Paleozoic, began to fragment during the Late Triassic–Early Jurassic transition, with major rifting becoming established around 200 million years ago. The breakup proceeded in several stages rather than as a single event.

• Pangea Breakup (c. 200 Ma onward): Major rifting divided Pangea into northern Laurasia and southern Gondwana, although the separation was progressive and involved several stages of continental rifting and seafloor spreading.
• Gondwana Fragmentation: During the Jurassic and Cretaceous, Gondwana progressively separated into Africa, South America, Antarctica, Australia, India-Madagascar and other continental fragments. The timing differed between individual breakup events.
• India's Gondwana Position: India remained part of Gondwana through much of the Jurassic and Early Cretaceous. It was not isolated from all other landmasses throughout this interval, and its geographic relationships changed as surrounding Gondwanan fragments separated.
• India–Madagascar Separation: India and Madagascar separated during the Late Cretaceous, generally associated with seafloor spreading beginning around 90–88 million years ago. India then moved rapidly northward across the Neo-Tethys Ocean.
• Northward Drift: India's northward movement accelerated after its separation from Madagascar. The opening of oceanic basins around India was part of the broader breakup of Gondwana and the reorganisation of the Indian Ocean region.
• India–Asia Collision: India eventually collided with Eurasia during the Cenozoic, broadly beginning around 55–50 million years ago. This collision post-dates the Mesozoic and contributed to the uplift and evolution of the Himalayan mountain system.
• Deccan Volcanism: The major phase of Deccan Traps volcanism occurred around the end of the Cretaceous, near 66 million years ago, well before the main India–Asia collision.

For Telangana, the breakup of Gondwana is particularly important because the Pranhita-Godavari Basin is an intracratonic Gondwana basin containing thick Permian–Cretaceous sedimentary successions. Its Mesozoic strata record changing fluvial, lacustrine and other continental environments during the tectonic evolution of the Gondwana landmass. :contentReference[oaicite:1]{index=1}

The Triassic Period marks the beginning of the Mesozoic Era and followed the end-Permian mass extinction, the most severe known mass extinction in Earth's history. Ecosystems gradually recovered, while archosaurs diversified and the first dinosaurs appeared during the Late Triassic. Pangea remained broadly assembled during much of the period.

In the Pranhita-Godavari Basin of Telangana, the Triassic succession includes formations such as the Yerrapalli, Bhimaram, Maleri, and Dharmaram formations. The Maleri and Dharmaram successions preserve important Late Triassic vertebrate and early dinosaur fossils. :contentReference[oaicite:2]{index=2}

• Lower Maleri Formation (Late Carnian–Early Norian): The Lower Maleri Formation contains a diverse Late Triassic vertebrate assemblage, including the early dinosaur Alwalkeria maleriensis. Its precise evolutionary position has been debated, so it is safer to describe it as a small early saurischian dinosaur rather than definitively as a theropod. The formation also contains rhynchosaurs, phytosaurs, aetosaurs and other vertebrates.
• Upper Maleri Formation: The Upper Maleri Formation contains an important early Norian dinosaur assemblage. The 2025 species Maleriraptor kuttyi was described from a specimen collected about 1 km south of Annaram village. It represents a herrerasaurian dinosauriform and is approximately 220 million years old. :contentReference[oaicite:3]{index=3}
• Dharmaram Formation: The Dharmaram succession spans the Late Triassic–Early Jurassic transition. The Lower Dharmaram is Late Triassic, while the Upper Dharmaram is Early Jurassic and has yielded dinosaur fossils including Lamplughsaura dharmaramensis. :contentReference[oaicite:4]{index=4}
• Telangana's Triassic Environment: The Pranhita-Godavari basin preserves mainly continental deposits formed in fluvial and related terrestrial environments, including rivers, floodplains and associated depositional settings. The sedimentary record indicates a seasonally variable landscape supporting diverse reptiles, amphibians, plants and early dinosaurs. :contentReference[oaicite:5]{index=5}

The Jurassic Period followed the Triassic and was marked by major diversification of dinosaurs, the continuing breakup of Pangea, and the expansion of several dinosaur groups. The first birds appeared during the Jurassic, while sauropod dinosaurs became widespread and diverse.

Telangana Connection: The Jurassic succession of the Pranhita-Godavari Basin includes the Upper Dharmaram Formation and the Kota Formation. The Kota Formation is especially important for early sauropods, including Kotasaurus yamanpalliensis and Barapasaurus tagorei. Published palaeontological studies place both taxa in the Early Jurassic Kota Formation, although precise numerical dating of parts of the Kota succession remains imperfect. :contentReference[oaicite:7]{index=7}

Key Discoveries:

• Kotasaurus yamanpalliensis: An Early Jurassic basal sauropod from the Kota Formation near Yamanpalli in present-day Mancherial District. GSI investigations recovered approximately 840 skeletal fragments representing at least 12 individuals. The species was formally described in 1988. :contentReference[oaicite:8]{index=8}
• Barapasaurus tagorei: A large basal sauropod from the Early Jurassic Kota Formation. Its fossils include about 300 bones representing several individuals, associated with fossil tree trunks. The type locality lies near Pochampalli in present-day Maharashtra, close to the Telangana region of the Pranhita-Godavari Basin. :contentReference[oaicite:9]{index=9}
• Lamplughsaura dharmaramensis: A basal sauropodomorph from the Early Jurassic Upper Dharmaram Formation of the Pranhita-Godavari Basin. :contentReference[oaicite:10]{index=10}
• Bopparam Fossil Discovery: Fossil wood and animal remains reported from Bopparam village in Mancherial District in 2025 have been estimated at around 230 million years old. This places the discovery in the Late Triassic, not the Jurassic. State officials reported plans to display the fossils in the State Museum. :contentReference[oaicite:11]{index=11}

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The Cretaceous Period was the final period of the Mesozoic Era. During this interval, Gondwana continued to fragment, India separated from Madagascar and began its rapid northward movement, flowering plants diversified, and dinosaurs remained dominant terrestrial vertebrates until the end-Cretaceous extinction around 66 million years ago.

In the Pranhita-Godavari region, the Cretaceous succession includes the Gangapur Formation and younger deposits associated with the later volcanic history of peninsular India. The Gangapur Formation is an Early Cretaceous unit of the Pranhita-Godavari Basin and overlies the Jurassic Kota Formation. :contentReference[oaicite:13]{index=13}

• Gangapur Formation (Early Cretaceous): A sandstone- and mudstone-dominated formation of the Pranhita-Godavari Basin in Telangana, deposited during the Early Cretaceous. Plant fossils are abundant in parts of the formation. :contentReference[oaicite:14]{index=14}
• Lameta Formation: The Lameta Formation is a Late Cretaceous, generally Maastrichtian-aged sedimentary unit associated with the Deccan volcanic province and is known for dinosaur fossils in several parts of India. Where discussing Telangana, it should be treated as part of the broader Late Cretaceous infratrappean record rather than implying that all Telangana exposures are identical to the classic Lameta sections of central and western India.
• Deccan Traps (c. 66 Ma): The Deccan volcanic province was produced by enormous basaltic eruptions mainly around the end of the Cretaceous. Its major eruptive phase overlaps the approximate age of the Chicxulub impact and the end-Cretaceous mass extinction, although the relationships among volcanism, climate change and extinction remain an active research topic.
• Intertrappean and Intratrappean Beds: Sedimentary intervals occur between or within volcanic sequences in parts of the Deccan volcanic province. These deposits can preserve freshwater organisms, plants and other fossils and provide evidence of environments that existed between volcanic episodes.
• Telangana's Cretaceous Environment: Cretaceous sedimentary environments in and around the Pranhita-Godavari Basin included fluvial and other continental settings. Fossil plants and other organisms provide evidence for changing landscapes as Gondwana fragmentation and regional tectonic and volcanic processes continued.

The Pranhita-Godavari (P-G) Basin in and around northern Telangana is one of India's most important Gondwana geological archives. Its sedimentary succession extends from the Permian into the Cretaceous and preserves a long record of changing terrestrial environments, fossil plants and vertebrate life. The basin contains roughly several kilometres of Gondwana sedimentary fill, with published estimates varying according to the area and stratigraphic interval considered. :contentReference[oaicite:15]{index=15}

• Vertebrate Fauna: The basin has yielded important fossils of early dinosaurs and other vertebrates, including Alwalkeria, Maleriraptor, Kotasaurus, Barapasaurus, Lamplughsaura, phytosaurs, aetosaurs, rhynchosaurs and other Triassic and Jurassic animals. :contentReference[oaicite:16]{index=16}
• Plant Fossils: Gondwana strata of the basin contain abundant plant fossils. The Nimugudem area is particularly important for Permian and younger Gondwana plant mega- and microfossils.
• Stratigraphic Record: The Pranhita-Godavari Basin preserves a thick sedimentary succession deposited over approximately 200 million years, from the late Paleozoic into the Mesozoic. The official National Data Repository describes about 3,000 metres of sedimentary fill, while other geological studies report thicker successions in parts of the basin. :contentReference[oaicite:17]{index=17}
• Future Potential: The basin's exceptional fossil record provides strong potential for systematic palaeontological research, site conservation, interpretation centres and carefully managed fossil-heritage tourism.

The Pranhita-Godavari Valley is a remarkable geological archive of Telangana and adjoining regions – preserving evidence of environments and ecosystems that existed hundreds of millions of years before humans.