and fluid, and can change shape quite frequently. Braided rivers can have variable, erratic flows, which can lead to successive periods of greater deposition or erosion. Entire bars can be created, destroyed, or migrate across a channel over the span of several years.

These formations are often composed of poorly-sorted sand and/or gravel. The generally coarse material is the result of the processes common to braid bar formation, and more broadly, braided rivers. Braided