Geomorphological Knowledge of Ancient Indians

Summary

This comprehensive survey explores the ancient Indian understanding of landforms, soils and geological processes. It begins with the Ṛgveda, where poets use terms for mountains, rivers, plateaus, caves and deserts, illustrating an awareness of varied terrain. Later Vedic texts and the Mahābhārata mention snow‑clad peaks, rugged lands, fertile plains and marshes, while the epics describe the Himalayas, Vindhyas and oceans in vivid detail. The article then surveys Purāṇic literature, which classifies soils by colour—white, red, yellow, black—and attributes qualities such as salinity, alkalinity or fertility to them, linking the taste of water to the surrounding rock. Varāhamihira’s Bṛhat‑Samhitā and the Sukranīti set out observations on hydrology, noting that rivers carry ten times more water at the mouth than at the source and that the character of soil changes over thousands of years. Jain works and the Arthaśāstra discuss mines, minerals, rocks and the suitability of land for agriculture or settlement, indicating practical geological knowledge. The article argues that ancient Indians recognised geomorphic processes such as erosion, sedimentation and uplift, though they expressed these in mythological or cosmological idioms—comparing the earth to a tortoise or snake supporting mountains. By collating references across genres, the author shows that geomorphological concepts permeated religious texts, scientific treatises and political manuals, reflecting both abstract cosmology and empirical observation. The study concludes that pre‑modern India possessed a nuanced, if non‑systematic, appreciation of geomorphology that informed agriculture, city planning, irrigation and religious symbolism.