hˈɪɹ sˈɔɪlz ɑːɹ mˈoʊstli dᵻɹˈaɪvd fɹʌm bæsˈɔltɪk ɹˈɑːks, ɡɹˈænɪt ɹˈɑːks, tɹˈæp ɹˈɑːk ɔːɹ ɐlˈuːvɪəlz ɐlˈɔŋ kɹˈiːks ænd ɹˈɪvɚz.
Here soils are mostly derived from basaltic rocks, granite rocks, trap rock or alluvials along creeks and rivers.