 Okay, so I want to say a little bit more about sediment water mixtures. So this sediment mixing with the water changes the characteristic of the water, and when we were talking about turbidites, we talked about how the density of the flow is higher when you have sediment mixed in with the water. I think I'll back to thinking about the Reynolds number. We have the Reynolds number as the flow speed times the flow depth times the density over the viscosity of the flow. So when your density is higher, your Reynolds number is higher and the flow is more turbulent. So almost always sediment water mixtures are more turbulent if they have a certain amount of sediment in them, and because the Reynolds number is higher because density is higher. However, we can also have changes in viscosity. So this density makes the Reynolds number higher and more turbulent, but sometimes the viscosity of the fluid increases if you mix sediment and water. So the viscosity increases if there are a lot of clay minerals and clay grain sizes. So that has to do with the cohesiveness of clay minerals. Remember, with our Holstrom diagram, we have our grain size and our flow speed, and we have this characteristic here where we have the clay grain sizes are hard to erode. That cohesive behavior here is equivalent. It also produces an increase in viscosity. So if you have a lot of clay in these sediment water mixtures, then the flows are less turbulent because the viscosity, an increase in viscosity, reduces the Reynolds number. And if you have enough clay in the flow, sometimes the mud flows can actually be laminar. So if you mobilize a huge amount of mud that's behaving as sort of a discus fluid as opposed to as glass or something like that, you end up with this very thick flow. And it's one of the reasons mud flows are sometimes very damaging to people's houses is because they don't go and flow around the house because they have so much internal friction and they're behaving as a highly viscous flow. They'll just push the whole house over. So the sediment water mixtures are really interesting in terms of how the laminar and turbulent behavior varies depending on how much sediment is present and what the grain size of that sediment actually is. And then there's a second thing that's really important for sediment water mixtures, and that's that the grains, usually when we've been talking about grains, we've been talking about them in isolation, say we have a grain on a bed. But in sediment water mixtures, the grains are really densely packed, so you have water between them here. And usually when we've been talking about sediment transport, we've talked about say the Bernoulli effect picking up the grain. But one of the things that happens in these really dense flows is that the grains will collide with each other. So if this grain is moving up and it collides with this one, it'll push, this grain will move up and it'll collide with this one and it might end up moving that way or maybe it collides with this one. So the grains can actually be transported much more easily because they're colliding against each other, and the energy that the grains have are being transmitted to other grains instead of to the friction in the water and the flow. And so when you have these sediment water mixtures, you get a lot of these grain-grain interactions. And one of the things that happens in this particular case is that it's very difficult to sort out the grain sizes. And so usually what happens is that the grains that get deposited are the ones that interact and hit the bottom of the flow, and it's not so much determined by grain size, it's just their location in the flow. So grains closer to the bottom are deposited from flows like this, particularly as they start to slow down. And that's irrespective of size. So if we think back to the Boma A facies, which is that bottom one that is massive, that is what's happening to get that deposit. The initial part of the termidite has so much sediment in it when it's depositing the Boma, the A part that those grains are colliding, and you're not sorting them very well. It's true that the larger grains are still closer to the bottom of the flow, so there are more of them. More of them do get deposited, but it's not very well sorted. And the collisions of the grains stop the bed forms from being created. The bed forms need rolling and saltating grains to create the ripples or even the upper planar lamination. When you have too many grain collisions, it disrupts those bed forms. So basically the Boma A facies suggests a dense sediment water mixture. Thanks for watching.