About three-fifths of the land area is part of the Gulf Coastal Plain, a gentle plain with a general descent towards the Mississippi River and the Gulf of Mexico.
ɐbˌaʊt θɹˈiːfˈɪfθs ʌvðə lˈænd ˈɛɹiə ɪz pˈɑːɹt ʌvðə ɡˈʌlf kˈoʊstəl plˈeɪn, ɐ dʒˈɛntəl plˈeɪn wɪð ɐ dʒˈɛnɚɹəl dᵻsˈɛnt təwˈɔːɹdz ðə mˌɪsɪsˈɪpi ɹˈɪvɚ ænd ðə ɡˈʌlf ʌv mˈɛksɪkˌoʊ.