STRATIGRAPHIC SECTIONS IN SOUTHWESTERN UTAH AND NORTH- 

 WESTERN ARIZONA. 



By John B. Reeside, jr., iind Harvey Bassler. 



INTRODUCTION. 



The stratigraphic data contained in this 

 papei' were gathered in the autumn of 1919 

 during the course of a reconnaissance of part 



as the stratigraphy of the region has features 

 of general interest it has seemed worth while 

 to record our observations, though they are 

 somewhat scattered. 



4'/i R.4 W. 



O 10 



SO>Eles 



Figure 10. — Map showing Idealities where sections were measured in Washington Coimty, Utah, and Mohave County, Ariz. 



of Washington Comity, Utah, and Mohave 

 Comity, Ariz., made chiefly to procure mforma- 

 tion as to the possibility of the occmrence of 

 petroleum in that region. As very few de- 

 tailed data on the stratigraphy of the region 

 are available in pubhshed literatm-e and also 



Washington County lies in the extreme 

 southwest corner of Utah, and Mohave County 

 in the extreme northwest corner of Arizona. 

 Tlie region is part of the Colorado River drain- 

 age basm — in fact, it might be considered to be 

 within the northern confines of the Grand 



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