ðə tˈɑːp ʌvðə fˈɑːɹmɪŋtən mˈɛmbɚ ænd bˈɑːɾəm ʌvðɪ ˌoʊvɚlˈaɪɪŋ dənˈɑːzˈɪn mˈɛmbɚ hˈæzbiːn ɹˌeɪdɪoʊmˈɛtɹɪkli dˈeɪɾᵻd tə sˈɛvənti θɹˈiː.ˈeɪɾi θɹˈiː plˈʌs ɔːɹ mˈaɪnəs zˈiəɹoʊ.ˈeɪtiːn
The top of the Farmington member and bottom of the overlying De-na-zin member has been radiometrically dated to 73.83 ± 0.18