TlIK OLDER MESOZOIC OF ARIZONA. 



43 



then carried it on a distance of 1() miles farther and l(>t it terminate at 

 the summit of the Shinarump, at an elevation of 

 about 6, ()()() feet ahove the sea. 



Desert jttinn iij Iht yir/inn shoifit in jitj. fi. 



1. Ciulionilcnms siiii<lstciiic (lliickiicss iiiikiKuvn ). 



2. MciciicDpic formiitiiin 



3. LithodeiulrDii iiii'iiilxT 



4. Varipgatcd mails 



5. Ijiint'stDUcs aiul mortar l)eds 



(). Calcereovis marls 



Feet. 

 ,500 



.S(H( 

 4(K) 

 •i(K) 

 UK) 



Total tliickness 2,000 



SEVrii/X VIl.~RED BUTTE. 

 [PI. IV, NO.] 



Tliis section needs no description. I liave 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 shdinn in fig. 7 (p. 44) • 



1. Carboniferous limestone (thickne.ss unknown). Feet. 



2. .\rgillaccous shales 75 



3. C^alcareous shales and limestones 100 



4. Argillaceous .shales 200 



5. Sandstones 100 



6. Argillaceous shales 12.5 



Total thickness of the Moencopie formation 600 



7. Sandstones 50 



8. .Shales 100 



9. Conglomerates and ('ross-bedded sandstones 60 



Total thickness of the Shinarump 210 



10. Trap 125 



Total height of butte 935 



SECTION VIII.— THE GEOLOGICAL COLUMN. 



P/nk Cliffs 



Little Colorado River 

 ^ Woodruff Butte 

 1 ro 



/f/ 



1 {Petrified Forest 



' Iki-' <^ Natural Bridga 



'; ■ip.y 



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. 



