40 MKSOZUK' FLOKAS OF IMTKl) STATKS. 



It has a length of 44 milos and oml)races all the phases of each of the sub- 

 divisions of the system. It is therefore the principal section of the 

 lower Little Colorado Valley. 



Discription oj Ihe sej^ion shown in fi(j. 3. 



1. CiirliDiiiferous limestone (tliickncss uukuown). Feet. 



2. Motmeopie formation. .")(X) 



.3. Lilhoilendion member (MX) 



4. Variegated marls. 400 



5. Sandstone ledge 100 



6. Limestones and mortar beds 200 



7. \'ariegatod sandstones 800 



S. Brown sandstones 300 



9. White sandstones 100 



Total I liii-kness 3, 000 



SECTION IV.—WINSLOW. 



[PL IV, G-IL] 



This section begins with the canyon of Clear Creek, which is formed 

 i)v heav}^ Carboniferous sandstone beds. It passes through the town of 

 Winslow and crosses the Little Colorado just above old Brigham City, 

 goes through Sunset, and follows nearly the line of the old trail from 

 Sunset to Keams Canyon, passing near Pottery Hill, Chimney Butte, 

 Castle Butte, the Moqui Buttes, Comar Spring, and Jettyto Spring. It 

 therefore embraces considerable of the overlying Cretaceous and other 

 later formations, the Trias extending some distance north of the southern 

 boundary line of the Navajo Reservation. 



Description oj the section shown in fig. Ji. 



1. Carboniferous sandstone (thickness unknown). Feet. 



2. MoeiKopie formation .500 



.3. Lithodendron member 700 



4. Variegated marls 400 



5. Limestones and mortar beds .300 



6. Variegated sandstones 800 



7. Brown and white sandstones 300 



3,oa) 



8. Cretaceous lignite bed 50 



9. Cretaceous ■. 750 



Total thickness 3, 800 



No. 8 is variable and No. 9 is estimated. 



