• Yamuna is not an example of an antecedent river.
• An antecedent river is a river that maintains its original course even after the land over which it flows undergoes tectonic uplift, such as the formation of mountains.
• These rivers are older than the geological structures they traverse and have the erosive power to cut through rising terrain, forming deep gorges.
• Examples of Antecedent Rivers in India
○ Indus River
○ Satluj River
○ Brahmaputra River
○ Kosi River
○ Saryu (Kali) River
○ Arun River (a tributary of the Kosi)
• These rivers originated before the uplift of the Himalayas and have carved out deep valleys and gorges as they continue to flow through the rising mountain ranges .
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