 So braided rivers have some very distinctive characteristics in terms of the sediment transport sedimentary structures and facies. So with all sediment transport, the Reynolds number is a really important aspect of it, including for braided rivers, and when the flow speed is high and the water depth is high, there's more transport. So one of the key things for rivers in general is that the floods, where the flow speed and water depth are highest, transport a lot of the sediment. So the floods are the things that really shape the overall geometry of the river and the channels. And they're the ones that control the maximum grain size because that's when the Reynolds number is highest and you can get the transport of those grains. The rest of the time, the finer sediment can still be transported. The other thing is that if you look at one of the channels here at a lower flow, you end up with the Reynolds number highest in the middle and lowest on the edge, so you end up with the coarsest sediment here and finer sediment being deposited on the shallow parts. The fine sediment is being transported everywhere in the whole channel but the coarsest sediment can only be transported in the deepest parts or during floods. So we have this very distinctive gradation in grain size. The coarser grains can never get up to here and the finer grains can never be deposited down here unless they get caught behind a boulder or a larger rock. So you end up with this nice transition in grain size. And then the third thing is that when you have the bars, the water is flowing into the upper part and you're loading downstream so the main bar migration is downstream. So these are some of the key dynamics for braided rivers. So the sedimentary structures are related to both the grain size and the flow speed and those characteristic of braided rivers often include trough cross stratification and that's from the migration of irregular dune shapes because the flow speed varies dramatically within the channel you almost never get straight crested dunes forming. On the edges of the bars where you might have granules to sand size type grains the flow speed can be very high you can get upper planar lamination and various types again of the trough cross stratification. Where if the flow speeds are low enough and the grains are coarse enough you can also get the lower planar lamination. It's also common along the very tops of the bars to get ripple cross lamination. And then in addition to these the migration of the bars can create a cross stratification that's not due specifically to a bed form of this type but the migration of the bars. So there's other forms of cross stratification from bar migration. So one of the key things with the sedimentary structures is that they mostly represent a flow in one direction going downstream.