1. Potholes are circular depressions over rocky beds; formed by stream erosion & abraision; pebbles collect in the depression and it deepens2. Plunge pools form @ the foot of the waterfalls due to the sheer force of the water; depth & size depends on hardness of rocks & size of waterfall

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1. 1. Potholes are circular depressions over rocky beds; formed by stream erosion & abraision; pebbles collect in the depression and it deepens
2. Plunge pools form @ the foot of the waterfalls due to the sheer force of the water; depth & size depends on hardness of rocks & size of waterfall