566 Emery — Green River Desert Section, Utah. 



The following sections illustrate the character of the 

 Wingate sandstone: 



Section of Wingate sandstone in The Ledge near French Spring. 



1. Sandstone, white, weathering light buff to white, 



medium grained, very massive, cliff maker ; cross- 

 bedded, contains bed of limestone conglomerate 

 about 100 below top . . 285'+ 



2. Sandstone, lighter in color than underlying sand- 



stone, grading into white above, less massive than 



(1) and (4) , cross-bedded 145' 



3. Sandstone like (4) but less massive 105' 



4. Sandstone, orange-terra-cotta in color, weathering 



red-brown, very massive, a single bed; cross- 

 bedded, very prominent ledge maker 375' 



5. Sandstone and shale, red-brown, Chinle formation, 



910'+ 

 Section of Wingate sandstone, North Temple Wash. 



(Measured with the aid of Milton Anderson and Walt M. Small of Tulsa, 



Okla.) 



1. Shale and fossiliferous limestone, Todilto (?) 



formation. 



2. Sandstone, white, massive, cross-bedded, forms dip 



slope of San Rafael Reef 517' 



3. Sandstone, white, less massively bedded than mem- 



ber above, but having similar characters. Con- 

 tains two thin beds of limestone conglomerate 

 within 25' of top 213' 



4. Sandstone, light buff, very massive, cross-bedded, 



cliff maker, supports San Rafael Reef; oil sand 



at base 150' 



5. Sandstone, red-brown, and variegated shale, Chinle 



formation. 



880' 



The beds described above were divided by Gilbert into 

 two formations, the " Vermilion Cliff" and the "Gray 

 Cliff," apparently largely because of color differences, 

 but that such a division was attended with difficulties is 

 evident from Gilbert's statements quoted below: 14 



"The Gray Cliff and Vermilion Cliff sandstones are often dif- 

 ficult to distinguish, but the latter is usually the firmer, standing 

 in bold relief in topography, with level top, and at its edge a 

 precipitous face. The former is apt to weather into a wilderness 



14 Gilbert, G. K., op. cit., p. 7. 



