Residuum
often used to refer to the soil and subsoil that forms as the result of long weathering over carbonate bedrock
en-GB/ɹɪzɪdjʊəm/
en-US/ɹɪˈzɪd͡ʒuəm/
often used to refer to the soil and subsoil that forms as the result of long weathering over carbonate bedrock