230 GEOLOGICAL SURVEY OF THE TERRITOEIES. 



2. Blue limestone, 30 feet. 



3. Lamiuated limestone, bluisli-gray, 10 feet. 



4. Coarse brownish quartzite, 3 feet. 



5. Light-bluish limestone, with cross cleavage, and containing in 



places grades with quartz crystals, 20 feet. 



6. Light grayish-blue limestone, on weathered surfaces light gray ; 



in the middle there is a baud of blue limestone with white 

 seams, 70 feet. 



7. Blue limestone, the upper layers very hard and compact. The 



lower layers are fossiliferous, and contain on the w^eathered 

 surface fragments of an Orthis like 0. desmopleura, Meek, and 

 UuonipJialus, 50 feet. 



8. Light-gray magnesian limestones, 30 feet. 



9. Quartzite',. 10 feet; 



10. Bluish magnesian limestone, 4 feet. 



11. Very hard, reddish quartzite, with interlaminated black shales, the 



latter about 6 inches in width, and the quartzite varying from 8 

 inches to 2 feet, 10 feet. 



12. Eed and green hard shales, in fine laminae, and breaking into small 



pieces, 2 feet. 



13. Eeddish- brown quartzitic sandstones. About 3 feet from the bot- 



tom there is a layer 6 inches thick of red shale, with mud-marks 

 in layers of a few inches each. The surfaces between the layers 

 are brightest in color ; 40 feet. 



14. Fine brownish-gray sandstone shale, in laminae one-fourth of an 



inch thickness, 2 feet. 



15. Brown quartzitic sandstone, in laminse from 2 to 4 inches thick ; at 



the top the surfaces are coated with green, 30 feet. 



16. Eeddish quartzitic sandstone, 20 feet. 



17. Dark-purplish quartzitic sandstone, containing near the top irregular 



layers of solt, dark-purple sandstone, with green glaucouitic (!) 

 grains, 15 feet. 



18. Eeddish quartzitic sandstone, somewhat irregular in structure, and 



containing layers of quartzite each a few inches in thickness, 15 

 feet. 



19. Quartzite, white below and pink above, in beds of 2 or 3 feet thick- 



ness, 15 feet. 



1). 20. Gneiss reaching to the bed of the creek. On the summit of the 

 , hill we have some of these beds folded in, as shown at the point 

 Jc in Fig. 1, Plate IX, between the gneiss and the next bed. 



21. Volcanic rock, causing the great fault between the points Jc and c 

 in the section. In this volcanic rock there are included frag- 

 ments of the stratified beds of the section given above. The thick- 

 ness of the rock is about 300 feet. 



c. 22. Sandstones somewhat coarse and conglomeritic, dipping at an 



angle of about 25° to 30°. 



d. 23. Volcanic rock, like 21. This forms the cap of the hill, marked d 



in the illustration. At the bottom it appears to be about 300 

 feet thick, and at the top must be nearly 1,000 feet. The rock is 

 porphyritic, and the lower layer next to beds of No. 24 have a 

 somewhat regular jointage at right angles to the dip. The color 

 below is a gray, becoming rusty in places and lighter in color 

 above. 

 24. Sandstones, for the most part coarse and conglomeritic, with inter- 

 laminated black argillaceous shales, especially near the top; below 

 we have a few bands of limestone, reaching 3 or 4 feet in thick- 



