Find a term from the labs, understand the process behind it, and see how it appears in the landscape. Each entry connects an explanation with a real observation and a model you can explore.
Term
Sand
Soil mineral particles 0.05–2 mm across in the USDA system. Other sediment classifications use a slightly different lower boundary.
What to look for
Sossusvlei dunes, Namib Desert. Wind transports loose sand by surface creep and saltation; the dunes record accumulated transport rather than individual grain paths.
