Post-glacial clay
Post-glacial clay (Swedish: Postglacial lera) is any sedimentary clay layer or deposit  that formed after retreating glaciers have abandoned an area. The term is used in Sweden. Compared to glacial clay, post-glacial clay tend to be less rich in calcium carbonate. In some places like around Göta Älv post-glacial clay distinguishes itself by having lower silt content than the glacial clays under it. References

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Sediments
Clay
Types of soil