518 r.lLLKTIN 84 



TABLK VIII. MECHANICAL ANALYSIS OF TYPICAL LAVA SOIL FROM CLIFFS 



TABLF IX. CHEMIC.\L AN.\LNSIS OF TYPIC.VL LAVA SOILS FROM CLIFFS 



VALLEYS OF WESTERN COLORADO PLATEAUS PROV- 

 INCE AND NORTHERN ARIZONA HIGHLANDS 



REGION 



The area described below extends westward from the Arizona 

 Divide, which diverts drainage from the Little Colorado on the 

 east and north to the Colorado River, and southward from Fre- 

 donia to Wickenburg. There are wide variations in soil, tempera- 

 ture, and precipitation. I'lic larger valleys of importance include 

 Lonesome, Big Chino, Little Chino, Aubrey, Hualpai, Detrital, 

 Sacramento, and Big Sandy. The smaller interesting valleys are 

 Williamson, Skull, Kirkland. Peeples, and JMcMullen, which are 

 occupied mostly by cattle ranches. 



LONESOME AND LITTLE CHINO VALLEYS 



Lonesome and Little Chino Valleys, having the same topo- 

 graphic soil and climatic conditions, and merging into one anoilier. 



