It is stratified and usually contains rounded gravel. Glacial outwash can occur in the form of outwash plains, outwash terraces, kames, and eskers. Loess thins away from the source. It was probably calcareous when first deposited. It is composed of noncrystalline glass fragments, quartz, feldspars, and ferromagnesian minerals such as hornblende and olivine.
Soils formed in volcanic ash tend to be high in allophane and have a very low bulk density.
This figure shows the extent of glaciation in central U.S. Glacial drift - general term for all of the sediment that has been transported and deposited by glacial mechanisms. It includes till, outwash, glacial lacustrine deposits, etc. The term also includes some loess deposits. Moraines - hummocky, depositional glacial landscapes composed of till. The most deposition probably occurred when the glacier was retreating.