THE OLDER MESOZOIC OF ARIZONA. 



43 



400 

 200 



LiHle Colorado River 

 -J Woodruff Butte 



then carried it on a distance of 16 miles farther and let it terminate at 

 the summit of the Shinarump, at an elevation of 

 about 6,000 feet above the sea. 



Description of the section shown in fig. 6. 



1. Carboniferous sandstone (thickness unknown). Feet. 



2. Moencopie formation °"" 



3. Lithodendron member 



4. Variegated marls 



5. Limestones and mortar beds 



6. Calcereous marls ^^ 



Totiil thickness 2,000 



SECTION VII.— RED BUTTE. 



[PI. IV, N-O.] I 



i 

 This section needs no description. I have given | 



it a length of 7 miles in order to embrace the lower | 



slopes of the butte. These are much lower on the | 



southwest side and ultimately terminate in the val- | 



ley of one of the branches of Cataract Wash, which ; 



becomes a limestone canyon. | 



Description oj the section shown in fig. 7 (p. 44) ■ ° 



1. Carboniferous limestone (thickness unknown). Feet. o 



2. Argillaceous shales ' ^ > 



3. Calcareous shales and limestones 100 g 



4. Argillaceous shales - 200 ^ 



5. Sandstones ^^ 



6. Argillaceous shales 1-^ 



Total thif-kness of the Moencopie formation 600 



7. Sandstones 50 



8. Shales 10° 



9. Conglomerates and cross-bedded sandstones. 60 



Total thickness of the Shinarump - ■ 210 



10. Triip -- - ^25 



Total height of butte - 935 



SECTION VIII.— THE GEOLOGICAL COLUMN. „ 



Petrified Forest 



■ ]u Natural Bridga 



In the following section I have given the maxi- 

 mum thickness of all the beds, which brings the total thickness up to 

 3,500 feet. 



