180 



Kayisas Academy of Science. 



DEVONIAN (NOW MARTIN LIME- 

 STONE). 



4. Alternating chert and flint strata. 

 40 feet. 



5. Massive light colored marbled lime- 

 stone {Acervularia davidsoni abundant). 

 35 feet. 



6. Stratum of grit rock. 15 feet. 



MARTIN LIMESTONE. 

 325 feet. 



Generally pebbly cross-bedded quartz- 

 upper half. Gritty base. Shale at top. 



SILURIAN. 



7. Red to brown fossiliferous limestone 

 (Orthis davidsoni, Strombodes pentagouis). 

 65 feet. 



TONTO FORMATION. 



3. Massive to shaly, brown to red, 

 coarse, cross-bedded vitreous sandstone. 

 600 feet. 



9. Red, cleavage-jointed shales. 40 

 feet. 



10. Gray to red sandstone, falling 

 apart in angular blocks. 70 feet. 



APACHE GROUP. 



Troy Quaetzite. 



400 feet. 



Generally pebbly cross-bedded quartz- 

 ite with lenses of conglomerate. Shaly, 

 rusty beds with worm casts at top. 



11. Marbles, limestone (marbled lime- 

 stone). 70 feet. 



Vesicular basalt flow. 25-75 feet. 



MESCAL LIMESTONE. 



225 feet. 



Thin, varicolored, more or less dolomite 

 beds with cherty layers. 



12. Vitreous to soft, red purple, green 

 and white sandstone and shale, a> con- 

 glomerate completing the series. 150 feet. 



DRIPPING SPRING QUARTZITE. 



450 feet. 



Fine-grained varicolored arkosic quartz- 

 ite, much of it with dark red and gray 

 banding partings between the beds not 

 distinct. Ripple marks. 



BARNES CONGLOMERATE. 

 10-55 feet. 



13. Hornblende biotite granite and 

 olivine diabase (inti'usive) and dioryte (a 

 sill). 120 feet. 



14. Vitreous, soft, red, purple, green 

 and white sandstone and shale. 300 feet. 



PIONEER SHALE. 



150 feet. 



Maroon shale, arkosic and quartzite 

 near base. 



15, Conglomerate. 10 feet. 

 Great unconformity. 



SCANLON CONGLOMERATE. 

 0-15 feet. 

 Great unconformity. 



ARCH^AN. 



16. Gneiss. 100 feet. 



17. Granite and allied rocks. 600 feet. 



OLDER PRB-CAMBRIAN. 



The correlation shows that the formations of the Globe and Ray quad- 

 rangles and those of Canyon creek are identical. 



Albfrt B Reagan 



Ex-principal of the Southern Ute Boarding School, Ignacia, Colo. 



March 15, 1918. 



