The Godavari River, also known as Vradh Ganga or Dakshin Ganga, is the largest in Peninsular India, draining an area of approximately 312,812 square kilometres.
It has a complex system of smaller rivers and streams that account for about 10 per cent of India’s land, providing essential water for agriculture and electricity, and holding cultural significance for millions of people.Have you ever considered what the Godavari looked like millions of years ago? Did it flow the same way, or was its path different? What kind of environment existed when early humans and extinct animals roamed this vast area?
Experts, including geologists and archaeologists, study the layers of soil and sediments in the Godavari basin to answer these questions and uncover the river's hidden past.
One important site for studying these ancient layers is the Gangapur Dam area in the Nashik district. This site contains sediments that are about a million years old and provides some of the earliest evidence of human habitation in the Deccan region of India.
Initially excavated by Professor Sankalia, it has since been studied by various specialists, offering valuable insights into the evolution of human culture, the climate of the time, and how geological changes shaped the landscape.
The oldest layers consist of dark clay resembling peat, often filled with plant fossils, such as leaf impressions. This layer, found on one bank of the river, suggests that the area was once home to stagnant, swampy environments that supported a diverse range of plants and animals.
However, due to the highly acidic soils in Maharashtra, fossil evidence from this period is scarce. Still, it is known that species thriving in other parts of India at that time included water-loving animals like early hippos and elephants.
The next layers comprise red sediments deposited by the Godavari and its smaller rivers over 780,000 years ago. During this period, the rivers primarily changed shape due to sediment movement rather than tectonic activity, which was minimal. The climate was warm and humid, and as conditions improved, the rivers began to flow more vigorously.
This increased flow introduced more oxygen and led to chemical changes in the environment, resulting in the deposition of red silt over older mud.
Rivers of this time would have been wide and shallow, allowing finer sediments to accumulate along the banks, creating rich floodplains that supported a variety of wildlife, including large extinct animals.
Around 790,000 years ago, significant movements and shifting of the Earth's crust began to reshape the land, resulting in the formation of steep, fast-flowing streams and deeper river channels. This caused the rivers to deposit larger stones and coarse sediments in the area.
These deposits frequently contained ancient cultural artifacts in the form of Early stone tools, indicating that the dynamic climate supported a wide range of wildlife. Animals such as elephants, wild cattle, and early horses roamed the Godavari basin during this time, and early forms of Homo erectus also inhabited the area, leaving behind stone tools that show evidence of their presence and activities.
About 130,000 years ago, a major climatic shift occurred in Peninsular India, marking the end of the Middle Pleistocene period. This transition changed the environment from a wet and humid climate, conducive to forests and rivers, to much drier conditions that posed challenges for plants and animals.
We know about these changes from layers of soil and fossils that document the kinds of animals and early humans that inhabited the region.
During this time, the Deccan Upland became significantly drier, with a climate that alternated between wet and dry seasons. In the early phases (c. 129,000 to 71,000 years ago), the Godavari lost its steady, perennial flow and transitioned to highly seasonal, storm-fed regimes that oscillated between intense erosion and massive sediment deposition.
During periods of strong monsoons, the river carried a tremendous volume of water, carving deep channels. However, when the monsoon weakened, the river could no longer transport its heavy sediment load, resulting in widespread deposition of sand and gravel in the basin.
This alternating cycle of high and low monsoon conditions caused the river to behave alternately as a singular deep river and a braided river. During intense multi-millennial droughts, large stretches of the river dried up entirely, creating isolated, stagnant water bodies and pools along the riverbeds, which contained significant clay deposits.
This period is considered one of the richest in terms of animal diversity in Indian prehistory. Despite the changing climate, the persistent water pools and expansive grasslands in the Godavari and Manjara valleys acted as critical ecological refuges, supporting large animals such as the Indian hippopotamus, straight-tusked elephants, Pleistocene horses, prehistoric water buffalo, blackbuck, spotted deer (chital), and sambar.
The middle phase of the Late Pleistocene, spanning approximately 71,000 to 29,000 years ago, was a turbulent period marked by a catastrophic volcanic event known as the Toba super-eruption in Sumatra, Indonesia. This time also experienced profound environmental changes and critical milestones in human prehistory as modern humans began to diversify and innovated new blade-based technology to make tools, along with other cultural developments such as symbolism, art, craft specialisation, advanced hunting and foraging strategies, etc.
During this subphase, initially, the Godavari River lacked strong monsoon rains, leading to a decrease in its water flow. Sediments accumulated in the valley, causing widespread siltation and transforming it into a seasonal, braided stream.
However, around 60,000 years ago, sudden and erratic bursts of rainfall resulted in violent flash floods, which allowed the Godavari to rapidly carve through the old sediments, creating deep channel incisions and step-like terraces.
The resurgence of the monsoon turned the rivers perennial, and the landscape became lush and green again. This flourishing environment, however, was followed by another extreme dryness phase around 21,000 years ago, known as the Last Glacial Maximum.
In the Godavari Valley, this extremely arid phase is represented by large deposits of gravel, sand, and silt, suggesting that vegetation was sparse and erosion occurred. During these dry conditions, rivers became seasonal and struggled to transport sediment, leading to the formation of sandbanks. The presence of significant calcium carbonate in the soil from that time indicates the harsh environmental conditions.
This period is also known for the "Late Pleistocene extinction event," which lasted from about 50,000 to 10,000 years ago and affected large land animals weighing over 100 pounds. In the Godavari basin, several noteworthy species went extinct, including Palaeoloxodon namadicus, a giant elephant that may have been the largest land mammal ever; Stegodon namadicus, a large relative of elephants with long tusks; Hexaprotodon, a type of hippopotamus that lived in rivers; Equus namadicus, an ancient horse resembling a zebra; Indian Aurochs, a wild cow that eventually disappeared but can be seen today in domesticated Zebu cattle; and the Asian Ostrich, which became extinct in India, leaving behind old eggshells.
As these large animals vanished, modern humans began to arrive in the Deccan region, living alongside both these ancient creatures and other archaic human groups in India.
However, as the climate became more challenging, the archaic populations gradually disappeared, leaving modern humans as the sole survivors. Evidence of their lives can still be found today in the sandy and silty layers of soil from that time in the form of blade and flake tools made on chert, chalcedony, agate and other types of silicified rocks.
Around 11,700 years ago, the Earth's climate changed dramatically as the glaciers from the last Ice Age began to melt. This marked the beginning of the Holocene period, characterised by a generally stable and warm climate, although some sudden changes occurred throughout.
During the Early Holocene, which lasted from about 11,700 to 8,200 years ago, a warming climate led to the retreat of glaciers and the rise of sea levels. Evidence from sediments of this period reveals high-energy deposits and indicates that vegetation was beginning to thrive.
Heavy rainfall supported the growth of dense, closed-canopy moist deciduous and evergreen forests across the Deccan Plateau, particularly in the Godavari Basin.
This region was inhabited by forest-dwelling browsers, edge species, and some surviving megafauna, such as Elephas maximus (Asian elephants), gaurs, and various deer species that thrived in wooded environments.
From 8,200 to 4,200 years ago, during the Mid-Holocene, the climate underwent another shift. This period experienced stronger monsoons and significant flooding, which left behind layers of rich floodplain soil that can still be found today.
Around 6,000 years ago, a major climate shift occurred as the Indian Summer Monsoon began to steadily weaken, leading to an era of increased aridification. As rainfall decreased, the vast tropical forests shrank towards the Western and Eastern Ghats, giving way to open savanna grasslands and thorn scrub forests across the interior plateau.
This newly opened environment created a continuous source of forage, which allowed grass-eating herbivores—including native wild cattle, antelopes (such as the Blackbuck), and various species of deer—to multiply rapidly.
The abundance of grazing land and herbivore populations attracted pastoralist communities to the Deccan, directly triggering the expansion of Neolithic-Chalcolithic agro-pastoral economies and leading to the widespread domestication of cattle in the region.
Around 4,200 years ago, we entered the Late Holocene, a period marked by very dry conditions. This time saw cycles of cooling and the emergence of the El Niño-Southern Oscillation (ENSO), which influenced climate patterns.
Sediments from this period show signs of increased dryness, coarser soil grains, and more dust, indicating environmental changes alongside early signs of human activity.
Today, above these ancient sediments, we can find remnants of the last hunter-gatherers from the Mesolithic period, as well as settlements and pottery from the Jorwe culture of the Chalcolithic period. Additionally, traces of the Satavahana settlements in the old area of Nashik highlight the rich history of human civilization in this region.
