278 



GEOLOGY OF EASTERN WISCONSIN. 



Earth. 



1. Curved strata of hard, compact, flint-like, bluish dolomiti!. 18 inch ^. 



2. Compact bluish white dolomite. Purest layer. 13 inches. 



3. White compact dolomite, with quartz in layers, at the bedding i^.a'i. iM 



inches. 



4. Compact whitish dolomite, simUar to the above, but less silicious. 9!l it ^nes. 

 Unexposed, b to 7 feet. 



B. Blue compact hard dolomite, somewhat silicious. 9 inches. 



6. Yellow, fine-grained dolomite, softer than the above. 3 feet. 



7. Thin sandy, argillaceous layer. 1 inch. 



8. Thin bedded dolomite, suitable for lime. 12 inches. 



9. Kne grained, but rough bedded dolomite. 3 feet. 



'— T 10. Thinner bedded, compact dolomite. 3 feet. 



11. Thin, shelly, sandy layer. 10 inches. 



12. Unexposed. 3 feet. 



■^,i 13. Mottled brecoiated dolomite. 18 inches. 



14. Very rotten, chippy layer. 18 inches. 



15. Brecciated mortled layer, as above. 18 inches. 



16. Thick bedded, rough, uneven-textured dolomite. 6 feet. 



^ 17. Shelly rotten layer. 3 feet. 



18. Not exposed. 3 feet. 



.* - >s-" 19. R^tugb, nneven-tex*,ured dolomite. 1 foot. 

 ; — ;10. Flinty layer. 4 inches. 



Jl. Somewhat sandy, dolomitic limestone. 4 inches. 

 l-^"^^*^ 23. Kough, irregular dolomite. 3 feet. 



sj-' 23. Sandy layer. 1 foot. 



21. Light colored, slightly silicious and moderately hard dolomite. 2 feet, 



25. Broken rotten layer. 14 inches. 



2li. Silicious, dolomitic limestone, very hard and flint-like. 2 feet and 9 inches. 



27. White sandstone, marked with green. 4 inches, 

 23. Sandy layer. 3 inches. 



29. Similar to No. 26. 3 feet and 3 inches. 



30. Oolitic layer. 4 inches. 



31 Coarsely brecciated layer, chiefly sandstone, but with some quartz and quart- 

 zite-Iike rounded and angular masses. 4 feet and 2 inches. 



22 Coarse friable sandstone of uniform grain, and containing nodules of iron 

 ore. Quai'tzite-liko layer near the top. 3 feet and 8 inches. 



Unexposed. 



