ðiːz slˈeɪt dᵻpˈɑːzɪts wɜːɹ ˈɛstᵻmˌeɪɾᵻd təbi fˈoːɹ,zˈiəɹoʊzˈiəɹoʊ zˈiəɹoʊ mˈiːɾɚz ɪn θˈɪknəs ænd ɹˈæn fɔːɹ ɐbˌaʊt wˈʌnhˈʌndɹɪd fˈɪfti kɪlˈɑːmɪɾɚz fɹʌmðə nɔːɹθwˈɛst tə sˈaʊθiːst dᵻɹˈɛkʃən.
These slate deposits were estimated to be 4,000 meters in thickness and ran for about 150 kilometers from the northwest to southeast direction.