Brahmputra river in Himalayas is an example of-

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Antecedent drainage. An antecedent stream (a thing that existed before) is a stream that maintains its original course and pattern despite the changes in underlying rock topography. A stream with a dendritic drainage pattern, for example, can be subjected to slow tectonic uplift. However, as the uplift occurs, the stream erodes through the rising ridge to form a steep-walled gorge. The stream thus keeps its dendritic pattern even though it flows over a landscape that will normally produce a trellis drainage pattern. Brahmaputra is a fine example of an antecedent drainage. C. Ganga Basin

Brahmputra river in Himalayas is an example of-

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