432 H. E. Gregory— Shinarump Conglomerate. 



and sandstones of Permian age by a widespread unconformity. 

 Above the Shinarump conglomerate lie in apparent conformity 

 a series of calcareous and argillaceous shales with some sand- 

 stone and a group of unique limestone conglomerates, all 

 deposited in upper Triassic time. 



The setting of the Shinarump conglomerate in adjacent 

 strata is indicated by the following portions of selected sec- 

 tions, which it will be noted were measured at widely separated 

 localities. 



Toquerville (Huntington) 

 (Bull. Geol. Soc. Am., xviii, p. 385, 

 1907) 



Soft purple and red shales 



Nodular gray shales 



Hard Shinarump conglomerate and 



sandstone 

 Slight unconformity 

 Chocolate shale and sandstone, 



150'-200' 



Kanab Valley (Walcott) 

 (quoted by Cross, Jour. Geol., xvi, 

 p. 106, 1908) 



Gray conglomerate and sandstone ; 

 conglomerate formed of small, agat- 

 ized pebbles and holding silici&ed 

 wood 50' 



Unconformity 



Dark, reddish - brown, shaly sand- 

 stones, passing into a massive evenly 

 bedded sandstone twenty feet from 

 the summit of the bed. Ripple 

 marks and mud cracks in upper 

 part 135' 



West Fork, Paria Creek (Gilbert) 

 (Geol. Surv. West of 100th meridian, 

 iii, p. 160, 1875) 



Variegated gypsiferous clays, with 

 silicified wood 450' 



White (to yellow) conglomerate, with 

 silicified wood, resting on eroded 

 surface of member below 0-75' 



Unconformity 



Chocolate gypsiferous clays ; soft 

 chocolate shale 225-300' 



Tsalee (Gregory) 



Shales and limestone of Dolores 



formation 

 Grey conglomerate and sandstone with 



with wood. Top of canyon wall 60' 



Unconformity 



Eed, cross-bedded sandstone and 

 shale 200' + 



Chinlee (Gregory) 



Argillaceous, calcareous, and aren- 

 aceous shales and limestones of 

 Dolores formation 100' + 



White sandstone and conglomerate 

 with petrified wood 20' 



Unconformity 



Red sandstone forming canyon wall 



100' + 



Fort Defiance (Gregory) 



Variegated shales and limestones 



200' + 



Limestone conglomerate 10' 



Red, brown, purple shales 60' 



Gray sandstone and conglomerate, 



hard, quartzose cross - bedded, 



pebbles of quartz, quartzite, fossil 



wood 20' 



Unconformity 



Sandstone and sandy shales, red, 

 brown, pink, gray, breaks into 

 ripple-marked, slabs 300' + 



Gilbert: Geology of Henry Mts., p. 6, 



1880 



Variegated clay shales, purple and 



white above, chocolate below, with 



silicified wood 300' 



Gray conglomerate with silicified 



wood ; the Shinarump conglomerate 



30' 

 Unconformity 



Chocolate-colored shale, in part sandy 



400' 



