The "Soil Type" pyramid. Showing the different names for soils depending on their percentage mixture of clay, silt and sand. (The little ant likes this diagram a lot, though she has noticed a few problems with it and her version has many additions and corrections, most pertaining to the interaction of various soils with her favorite mosses and if they attract any little things that are nice to eat or not.)
https://cdn.masto.host/sauropodswin/media_attachments/files/110/679/276/657/496/215/original/03f65069ea0f8786.png