Rare Paleobotanical and Associated Paleontological Specimens from Madhya Pradesh: Stratigraphic Context, Paleoecology, and Biogeographic Implications: A Comprehensive Review

Madhya Pradesh holds one of the most geologically continuous records of plant life on the Indian subcontinent. The strata spanning the Proterozoic Vindhyan Supergroup, the Gondwana sequences, and the Deccan Intertrappean beds preserve a fossil flora of rare scientific depth. This review examines the stratigraphic distribution and morphological character of key paleobotanical assemblages within these units, using botanical, xylotomical, and isotopic evidence to reconstruct the paleoenvironmental conditions under which they formed. The analysis follows the fossil record from Early Mesoproterozoic cyanobacterial mats and simple acritarchs through the dominant Glossopteris coal swamps of the Permian, the gymnosperm woodlands of the Jurassic, and finally to the angiosperm diversification documented in the Deccan Intertrappean localities. Each transition reflects a distinct combination of climatic, tectonic, and ecological pressures. Triple oxygen isotope data from silicified Deccan wood indicate mean annual precipitation between 1,760 and 1,860 mm during the latest Cretaceous, arguing for a hyper-humid tropical environment rather than the semi-arid conditions suggested by earlier sedimentological models. The palaeobiogeographic record of these assemblages is assessed against three competing dispersal frameworks: vicariance, stepping-stone dispersal, and the Out-of-India hypothesis. The review concludes that the geobotanical archive of Madhya Pradesh constitutes a primary reference for understanding how tectonic isolation, Deccan volcanism, and the Cretaceous-Paleogene boundary event collectively shaped the tropical floristic heritage of the modern northern hemisphere.