of the Cuzco Valley, Peru. 69 



Feet. 



4. Sandstone and conglomerate like No. 1, thin-bedded 3 



5. Sandstone, brown, with pebbles of clay shale 2 



6. Shale, chocolate colored, arenaceous, and thin-bedded 



calcareous sandstone 5 



7. Sandstone, brown, with lenses of red calcareous shaly 



sandstone 9 



8. Conglomerate, gray 2 



9. Sandstone, red, calcareous, friable, shaly 5 



10. Alternate layers of sandstone like Nos. 9 and 7, and 



lenses of pink-gray limestone a fraction of an inch 



in thickness 15 



11. Sandstone, gray-brown, with few lenses of conglomerate 4 



12. Sandstone, dark red, shaly, highly calcareous 4 



13. Sandstone, gray-brown 4 



14. Sandstone, dark red, shaly 5 



15. Alternating bands of sandstone like 2sTos. 12 and 13 13 



16. Sandstone, gray to brown, conglomeratic in places 



and containing lenses and narrow, more or less con- 

 tinuous bands of sandstone like ISTos. 12 and 13 .... 110 



17. Sandstone, red, calcareous, friable 5 



18. Sandstone, brown and gray, and chocolate-colored 



shale, in beds and lenses 6 inches to 4 feet in thick- 

 ness. Sandstone has calcareous cement; red shaly 

 beds vary in composition from calcareous sandstone 

 through argillaceous calcareous shale to pure lime- 

 stone. [Foliation surfaces sun-baked, rare ripple 

 marks 305 



19. Sandstone, dark red, highly calcareous, fine grained; 



quarried for building stone 6 



20. Sandstone, gray, conglomeratic ; abundant brown, flat 



pebbles of shale 27 



21. Sandstone, brown, calcareous, with limestone lenses . . 9 



22. Conglomerate, gray, with pebbles of brown sandstone 



and shale 10 



23. Sandstone, brown, calcareous 5 



24. Sandstone, gray and brown; with beds and lenses of 



conglomerate like ISTo. 1 and many fragments of 

 brown clay shale 55 



25. Concealed by debris; probably brown shaly sandstone 100 



26. Sandstone, brown and gray, with layers of abundant 



brown shale pebbles; strike 1ST. 80° E.; dip 40° SW. 60 



27. Beds 3 inches to 6 feet thick, of gray sandstone, with 



rare conglomerate pebbles; brown sandstone, with 

 many brown shale pebbles ; red to chocolate calcare- 

 ous shale and shaly sandstone ; beds of limestone one 

 half inch and less in thickness. Shaly parts of sand- 

 stone beds sun-baked and mud cracked 90 



