These are the oldest methods of building with adobe in the Americas until holes in the ground were used as forms, and later wooden forms used to make individual bricks were introduced by the Spanish.
ðiːz ɑːɹ ðɪ ˈoʊldɪst mˈɛθədz ʌv bˈɪldɪŋ wɪð ɐdˈoʊbi ɪnðɪ ɐmˈɛɹɪkəz ʌntˈɪl hˈoʊlz ɪnðə ɡɹˈaʊnd wɜː jˈuːzd æz fˈɔːɹmz, ænd lˈeɪɾɚ wˈʊdən fˈɔːɹmz jˈuːzd tə mˌeɪk ˌɪndᵻvˈɪdʒuːəl bɹˈɪks wɜːɹ ˌɪntɹədˈuːst baɪ ðə spˈænɪʃ.