HORIZON OF THE MARINE lURASSIC OF UTAH 635 



The writer, however, measured a detailed section near the 

 mouth of Cedar Canyon, about 6 miles due east of Loa, along the 

 west base of Thousand Lake Mountain, just east of the fault that 

 is reported by Button^ to form the west scarp of that mountain. 

 The section follows. Figure 2 shows the beds in the upper part of 

 the section. 



SECTION AT MOUTH OF CEDAR CANYON, 6 MILES EAST OF LOA 



Talus from cliffs of overlying lava. 



Alternating green and red sandy shales with occasional gyp- 

 sum beds. 



Covered slope, abundant gypsum fragments, probably gypsum. 



Gypsum with thin clay seams. 



Drab shale, more massive than No. 24, forms ledge. 



Thin-bedded drab shale in slope. 



Calcareous gray shale, in cliff, weathers with rounded surfaces. 



Slightly argillaceous notably cross-bedded limestone. 



Covered slope; digging shows red and gray clay. 



Dense thin-bedded calcareous shale or argillaceous limestone, 



forms bench. 

 19 32 Thin-bedded calcareous shale or argillaceous limestone, forms 



slopes. 



Brown, sandy, porous limestone. 



Greenish gypsum. 



Green argillaceous sandstone. 



Covered slope. 



Gypsum. 



Covered slope, probably red shale. 



Gray limestone. 



Thin-bedded drab shale. 

 5 Very light gray limestone. 

 16 Fairly well-bedded greenish, argillaceous sandstone. 

 10 Covered, probably shale. 

 20 Fissile red-brown shale, in a bench with marked re-entrant 



angles. 



Thin-bedded drab shale. 



Gray limestone, with thin shale near middle, fossiliferous. 



Greenish sandy shale. 



Thin-bedded drab limestone, slightly cross-bedded. 



Tan-colored, well-bedded argillaceous sandstone. 



White cross-bedded sandstone. 



989 

 ^ C. E. Button, "Report on the Geology of the High Plateaus of Utah," 1880. 



