lˈɔŋ pˈæsɪdʒᵻz fˈɔːɹmd dˈʊɹɹɪŋ ɐ lˈɔŋ pˈiəɹɪəd ʌv wˈɔːɾɚ tˈeɪbəl stəbˈɪlᵻɾi wɛn ðə klˈaɪmət wʌz wˈɔːɹmɚ ænd sˈiː lˈɛvəlz wɜː hˈaɪɚ ɹᵻdˈuːsɪŋ ɪɹˈoʊʒən θɹuːˈaʊt ðə mˌɪsɪsˈɪpi dɹˈeɪnɪdʒ.
Long passages formed during a long period of water table stability when the climate was warmer and sea levels were higher reducing erosion throughout the Mississippi drainage.