Mineralogical study of weathering products of granodiorite at Shinshiro City (III)

In the previous papers(1,2) it was clarified that the weathering profile was uniform in parent material and that it was formed under an environment of severe chemical weathering, in which the primary minerals in the parent rock became unstable and altered to secondary minerals. As the result of the preceeding study(2), the order of stability was shown as follows, from the highest order, Quartz - Hornblende - Feldspar - Biotite.