558 Emery — Green River Desert Section, Utah. 



the base are 60 to 75 feet of white to brownish buff sandy 

 shale with numerous interbedded thin sandstones of the 

 same color. This part of the formation makes a rather 

 conspicuous feature of the landscape, for it is in sharp 

 contrast to the nearly dead white color of the underlying 

 Pennsylvanian (?) sandstone and to the alternating red 

 sandstones and shales of the upper Moenkopi. The sand- 

 stone in the Moenkopi consists of fairly well-rounded 

 small quartz grains, held together by a calcareous cement. 

 The finer, more thinly bedded sandstones are beautifully 

 ripple-marked. 



About 140 feet above the base of the section near Tem- 

 ple Mountain is a thin layer of very calcareous buff sand- 

 stone, with a coquina-like appearance, containing many 

 fossil fragments. A hurried examination revealed no 

 identifiable specimens, but Mr. "Walt M. Small, consulting 

 geologist, of Tulsa, Oklahoma, who was with me when I 

 visited this section, informs me that he later obtained 

 collections from this horizon on the west side of the Swell. 



The character of the Moenkopi is shown in the follow- 

 ing detailed sections : 



Section of Moenkopi formation, North Temple Wash, I mile ± 

 north of Temple Mountain, San Rafael Swell, Utah. 



(Measured with the assistance of Milton Anderson and Walt M. Small of 



Tulsa, Okla.) 

 Unconformity 



1. Sandstone, reddish brown, medium grained with 



some purple shale at top 128' 



2. Sandstone and shale, buff to ecru. Contains a lens- 



ing oil sand 4' thick from 30' to 40' above base 117' 



3. Sandstone, red-brown, medium grained, thin to mas- 



sive bedded, cross-bedded, ripple-marked, contains 



some shale 193' 



4. Sandstone, weathers steel gray, darker gray-brown 



on fresh fracture, lenticular, saturated with 

 petroleum 5-8' 



5. Sandstone, buff to ecru, very limy ; contains broken 



fossils; weathered surface resembles coquina... 4' 



6. Sandstone and shale, buff, thin-bedded • 61' 



7. Shale, very sandy, white 75' 



Unconformity 



583-586' 



