404 



STRUCTURAL GEOLOGY OF NORTH AMERICA 



fXopifon reef 



Guoaalupe series 

 Dell Canyon;? Cherry Canyon-; Brushy Ca 



^-Wolfcomp series 



MERRA CADALLO 



FLORIDA MOUNTAINS 



V NORTHERN QUITMAN MOUNTAINS, TCXAJ „0 C .Y\^ ,0^ *0 



^ 



lation appear to have been rather wide, and the troughlike aspects of the 

 later Rio Grande depression were not yet developed. In wide areas, the middle 

 Tertiary flows and pyroclastic and volcanic alluvial beds lie with only slight 

 unconformity or discordance upon the earlier non -volcanic sediments. The 

 intense fracture belt and prominent tilted blocks which are so characteristic 

 of the Rio Grande depression and adjoining uplifts are later features. 



The development of the Rio Grande structural belt probably began in 

 late Miocene time and culminated . . . toward the end of Pliocene time. With 

 the development of the linked en echelon basins the Santa Fe sediments, 

 which are the characterizing feature of the Rio Grande depression began to 



Fig. 25.16. Cross sections of south-central New Mexico and the trans-Pecos of Texas. See index 

 map, Fig. 25.1. 



P, section across Chupadera Mesa. After Darton, 1928. Cm, Magdalena group; Ca, Abo sandstone; 

 Cc, Chupadera formation; "is, Dockum group; Kd, Dakota (?) sandstone; Km, Mancos (?) shale. 



O, section across Sierra Blanca system. After Darton, 1928. Cm, Magdalena group; Ca, Abo 

 sandstone; Cc, Chupadera formation; Is, Dockum group; Kd, Dakota (?) sandstone; Km, 

 Mancos (?) shale. 



R, section across the Zuni Mountains and the Cebolleta Mesa. Ca, Abo sandstone; Cc, 

 Chupadera formation; 'Em, Moencopi formation; "lis, Shinaru conglomerate; "lis, Chinle shale; 

 Jw, Wingate sandstone; Jt, Todilto sandstone; Jn, Navajo sandstone; Km, Mancos shale; Kmv, 

 Mesa Verde formation; Tb, basalt. After Darton, 1928. 



S, section across the Sacramento Mountains. Cm, Magdalena group; Ca, Abo sandstone; Cc, 

 Chupadera formation. After Darton, 1928. 



T, section from Guadalupe Point (El Capitan) eastward across Culbertson County, Tex. The 

 Delaware basin lies east of the section. After King, 1942a. 



U, section across the Sierra Caballo. After Darton, 1928. C, Bliss sandstone; O, El Paso 

 limestone and Montoya limestone; S, Fusselman limestone; D, Percha shale; M, Lake Valley 

 (?) limestone; Cm, Magdalena group; Ca, Abo sandstone; Cc, Chupadera formation; K, Creta- 

 ceous beds. 



V, section across Cooks Range. After Darton, 1928. C and O, Bliss sandstone, El Paso 

 Montoya, and Fusselman limestone; D, Percha shale; C, Lake Valley limestone, Magdalena forma- 

 tion; Pg, Gym limestone; \ Lobo formation; K, Sartan sandstone. 



W, sections across the Florida Mountains. After Darton, 1928. C and O, Bliss sandstone 

 and El Paso; Om, Montoya, and Fusselman limestones; Pg, Gym limestone; II, Lobo formation; 

 Tag, Tertiary agglomerate. 



X, north-south section across the San Juan basin. After Darton, 1928. C, Pennsylvanian and 

 Permian; 1, Triassic; J, Jurassic; Kmc, Mancos shale; Kpl, Point Lookout sandstone; Kmf, Menefee 

 formation; Kch, Cliff House sandstone; Kle, Lewis shale; Kpc, Pictured Cliffs sandstone; Kfd, 

 Fruitland formation; Kk, Kirtland shale containing Farmington sandstone member, Kkf; Kmd, 

 McDermot formation; Koa, Ojo Alamo sandstone; Tan, Animas formation; Tpt, Torrejon and 

 Puerco formations, Paleocene; Tw, Wasatch formation, Eocene. 



Y, sections across the northern Quitman Mountains, Texas. After Huffington, 1943. Pbbr, Briggs 

 formation (Permian); Jmu, Malone formation (Upper Jurassic); the following formations are 

 all Lower Cretaceous; Kt, Torcer formation; Ky, Yucca formation; Kb, Bluff formation; Kc, Cox 

 formation; Kf, Finlay formation; Kes, Espy formation; Kc, Etholen formation; T-Q, Tertiary and 

 Quaternary alluvium. 



