 So the sediments associated with glaciers have some very specific characteristics or facies. So sometimes you can see the specific types of landforms. So we mentioned, for example, the pavements that are ground flat by the glaciers. Often the glaciers create U-shaped valleys because they erode across a very large width of the valley. They often leave striations on the pavements and other aspects of the other places in the bedrocks. And then there are a host of other features that have a ton of different names. And many of those are in the form that the diamigthite is left behind. So, for example, moraines as an example. For our facies, we're actually going to talk mostly about the sediments and the rocks that are actually deposited from them. And so we're going to talk about the grains and how they're arranged. So we have the grain composition. And because physical weathering is more abundant than chemical weathering, it's basically the same as the bedrock that's eroded from the glacier. So for example, if the glaciers are eroding granites, most of the grains will have a granite composition. If it's eroding carbonates, most of the grains will have a carbonate composition. We also have the grain size. And glacial deposits have some of the widest grain sizes of any produced in environments. So that grinding process that creates pavements creates clay-sized grains of lipid glass because they have the same composition. So we often call that rock flour. And it'll go all the way up to boulders. And the ice can transport any of those. And so when the ice melts, those are all left behind. So if they're all combined together from the ice, we end up with the diamic type, which is unsorted with a mix of grain sizes. And we also have things like lone stones that might drop from icebergs into mudstones. So these are two types of rock that are not uniquely glacial but are very common in glacial faces. They're things to look for. There are also some characteristics of the grains that are common in glacial deposits and not anywhere else. So we have unique characteristics. And those come from this grinding process again. And in particular the faceted clasts, and especially if they have striations on them. So the only way we typically form clasts with one surface that's ground down is by that transport of ice over the bedrock and the grinding of those clasts against each other. And then we have often, we can define associated facies, which are environments that are next to these glacial environments and ones where some of the sediment is reworked. And these would be, for example, braided streams or river deposits, lake deposits, and some marine deposits or ocean deposits. And in the lake and marine deposits, you often see these lone stones. And turbidites are all often common due to the rapid deposition of sediment from the melting of the glacial ice. Thanks for watching.