STRATIORAPTTIC SErTIONS IN UTAH AND ARIZONA. 



65 



shale, with a Httlo thin limestone in the upper 

 part and some platy sandstone in the lower 

 part. At Diamond Valley (section 21, p. 77) 

 it is 140 feet thick. We can not say from the 

 data obtained in the small area examined 

 closely whether this unit is conformable or un- 

 conformable on the underlying beds. 



Lee *" noted near Cedar City a similar unit 

 350 feet thick; Stanton,*' near Glendale, Utah, 

 the same, 550 feet or more; and Dake,*' near 

 Teasdale, the same, over 375 feet. 



CRETACEOUS (?) SANDSTONE. 



Resting upon the variegated shale just de- 

 scribed is a series of buff sandstones with some 

 intercalated shale. These are visible at many 

 places along the lower flanks of the Pine Valley 

 Mountains, north of the region covered by our 

 work. A section of these sandstones was made 

 at Diamond Valley. The lower 90 feet of tliis 

 series is light-gray to brown sandstone, mostly 

 soft but with some hard layers and a little gray 

 and purple shale. This sandstone shows stem 

 imprints and carbonaceous matter. Above it is 

 a thin layer of very dense reddish and blue- 

 gray quartzite, and upon this 30 feet of gray 

 shale and carbonaceous sandstone. Above 

 this lower part comes 750 feet, more or less, of 

 heavy-bedded buff sandstone, of which the 

 lower 300 feet has soft sandstone layers and 

 shale between the harder sandstones, but the 

 upper 450 feet is buff sandstone with one 

 reddish layer. Above the rocks just described, 

 at the point of measurement, wash and basaltic 

 lava conceal the bedrock. No fossils were 

 observed other than the impressions of plant 

 stems mentioned. 



Lee "^ fomid on Coal Creek, near Cedar City, 

 above the shale which rests upon the marme 

 Jurassic limestone an unconformity marked by 

 a conglomerate, followed by 780 feet of varie- 

 gated shale and gray or light-colored sandstone, 

 upon which rests 125 feet of gray and yellow 

 sandstone, with coal and minor shale layers 

 and carrying Cretaceous fossils. Above these 

 coal-bearing beds in Lee's section is exposed 

 455 feet of sandstone with a minor amount of 

 shale and limestone and carrying marine 



« Lee, W. T., The Iron County coal field, Utah: U. S. Oeol. Survey 

 Bull. 316, p. 362, 1907. 



" Stanton, T. W., unpublished notes. 



<» Dake, C. !>., op. cit. 



« Lee, W. T., The Iron County coal field, Utah: U. S. Geol. Survey 

 Bull. 316, p. 362, 1907. 



Cretaceous fossils. Richardson ^'^ found in the 

 Colob coal field, not far from the areas examineil 

 by Lee, 2,500 feet of buff sandstone and drab 

 shale, with coal in the lower part, all of which he 

 referred to the Colorado group. Beneath it he 

 found 800 feet of varicolored shale and sand- 

 stone, gypsum, and marine limestone represent- 

 ing the Cretaceous ( ?) shale and Jurassic 

 limestone of this paper. Richardson ^' also 

 found in the valley of Virgin River near Mount 

 Carmel a series of beds including, in ascending 

 order, 15 feet of conglomerate, 400 feet of coal- 

 bearing shale and sandstone, 700 feet of shale 

 with marine fossils, and 1,000 feet of alternat- 

 ing sandstone ami shale containing marine and 

 brackish-water Colorado fossils near the base. 

 On these beds rests 10 feet of conglomerate, 

 then 700 feet of fresh-water sandstone and shale 

 possibly of Montana age, then another conglom- 

 erate, probably Tertiary. Stanton '"' found 

 near Glendale, 6 miles from Mount Carmel, 91 

 feet of coal-bearing gray sandstone and shale 

 resting on the Cretaceous ( ?) variegated shale 

 above the marine Jurassic. Upon this coal- 

 bearing unit rests 1,000 feet, more or less, of 

 drab sandy marine shale of Colorado age, and 

 upon tliis, in the section examined, 280 feet 

 of brown sandstone and shale with Colorado 

 fossils. 



TERTIARY (?l SANDSTONE. 



Above the buff Cretaceous sandstone series 

 is exposed in the flanks of the Pine \"alley 

 Mountains a pink sanilstone series. At a point 

 near Diamond Valley, 3 miles south of the local- 

 ity where the buff' sandstone was measured, an 

 exposure of 1,500 feet of these pink sandstones 

 was examined. It consists of massive sand- 

 stone beds, yellow %vith some red staining and 

 separated by soft sandstone, much of it red in 

 color, and red shale. As a mass this series is 

 pink and contrasts sharply with the lower buff 

 sandstone series. So far as could be deter- 

 mined by inspection from a high point several 

 miles away, the base of this exposure is very 

 close to the to pof the Cretaceous ( ?) sandstone. 

 Intervening outcrops piercing the Wiish and 

 lava cover aid in judging this, though continu- 

 ous tracing is impossible. 



'-'^ Richardson, G. B., The Harmony, Colob, and tanab coal fields, 

 southern Utah: U. S. Geol. Survey Bull. 341, p. 3sl, I90S. 

 ^1 Richardson, G. B., unpublished notes. 

 ^2 Stanton, T. W., unpubUshed notes. 



