1999) Geology of National Parks: Fifth Edition, Ann G. Harris, Esther Tuttle, Sherwood D., Tuttle (Iowa, Kendall/Hunt Publishing; 1997) External links . . . . . Geology of New Mexico Geologic provinces of Texas Sedimentary basins of North America Structural basins of the United States Oil fields of the United States Permian geology of New Mexico Permian geology of Texas