I s. 



Modified after Reeside. 1924 



Tw, Wasatch formation; Tn. Nacimiento formation (Puerco and Torreion faunal zones)-. Tan, Animas formation; Koa; Ojo 

 Alamo sandstone; Kmd, McDermott formation; Kkf, Fruitland formation and Kirtland shale; Kpc, Pictured Cliffs 

 sandstone; Kle, Lewis shale; Km, Mesaverde group; Kmc, Mancos shale 



Diagrammatic section across the San Juan basin from Durango, Col., to Pueblo Bonito, N. Mex. 



SW. 



spoo' 



Horizontal scale 



After Darton. 1922 



-j ■ ■ 



K, Cretaceous formations; Kmv, Mesaverde group; Kms, Mancos shale; Kd, Dakota sandstone; 

 Jn, Navajo sandstone; ^w, Wlngate sandstone; Tic. Chinle formation; lis. Shinarump 

 conglomerate; 'Rm, Moenkopl formation; PAL, Upper Paleozoic rocks 



Sections across the Gallup-Zuni basin, New Mexico. A, near Zuni; B, near Atarque. 



Fig. 26.11. Some basins of the Colorado Plateau. Reproduced from Hunt, 1956. For the San Juan basin 

 see also Fig. 25.13. 



