 A very important aspect of meandering rivers are the flood plain deposits. So when you have a river channel here and there's a normal water level in here, all of the sediment transport that's happening associated with the rivers within the channel and you often have plants in post-Divomian world, right? So you have plants growing on the outside. So here's some trees or bushes and things like that. And so a lot of times the flood plains have soil development between river floods. But through time sediment accumulates in the river channels, and there's erosion here, but almost all rivers are subject to floods. And when the water level goes up, there are two things that happen. One of which is that the amount of the cross-sectional area that the water is flowing through expands dramatically. And that allows the water and causes the water to slow down. There's more friction with the bottom and there's much broader flow. So the same amount of water flows through a given area at a much slower rate because the area, the cross-sectional area is much larger. So when the river goes from being confined to within the channel to exceeding the channel bank, there's a sudden slowdown in the flow speed. So you decreases rapidly. And we know that when the flow speed decreases that causes deposition and that deposition creates a natural levee on the side of the river. So that produces a levee, which is the high, a high deposited by the sediment just outside the river channel. And because the deposition rate is so fast, there's not very much erosion on the upstream side of the bed forms. And so you often get climbing ripples. And usually that grain size is relatively low because the course of sediment, even in a flood time, is going to be confined to the channel. And so usually you have, say, a medium sand near the channel. And because the flow speed is going, slowing down the further you get away, it'll find away from the channel. And eventually the water ponds, and that actually leaves a lot of mud behind, which is one of the problems when you end up with floods in towns is that the floods can bring in a huge amount of mud. So the signature of a flood deposit would be, for example, a soil with sand deposited on top of it that finds up to mud, and then you redevelop the plant communities and the soil formation processes.