soil profile

noun

a vertical succession of horizons, commonly lettered A, B, C (beginning at the surface), that have been subjected to soil-forming processes, chiefly leaching and oxidation.
a diagram of a vertical section of soil depicting the horizons.

Origin of soil profile

First recorded in 1920–25

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018