turbulent water by moving towards the opposite bank before approaching the confluence.

An early tributary is a tributary that joins the main stem river closer to its source than its mouth, that is, before the river's midpoint; a late tributary joins the main stem further downstream, closer to its mouth than to its source, that is, after the midpoint.

Forks

In the United States, tributaries sometimes have the same name as the river into which they feed, those are called forks.

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