﻿59 Union Springs 



Section in Union Springs by the Sanitarium 



Ft. Thick | Total 



i. Onondaga limestone, 8 feet thick, with large corals; 

 composed of light coarsely crystalline Ca Co 3 . Lowermost por- 

 tion stained red with ifon oxide and containing sand and 

 clay iron-stones of Oriskany age 8 .8 



2. Limestone in places replete with Stromatopora (See 



PI. 6) 2.3 3.! 



3. Dove colored limestone with conchoidal fracture, ap- 

 parently nonfossiliferous 2.3 5.4 



4. Bine-gray, even bedded, limestone 2.9 8.3 



5. Stromatopora limestone. (See PI. 6) 4.3 12.6 



6. Dark, heavy-bedded, bine limestone, with Stropheo- 



donta and Sp. vanuxemi 6.8 19.4 



7. Alternating beds of grayish and bluish limestone; beds 

 with many fractures; often dark, cherty, breaking with con- 

 choidal fracture. Sp. vanuxetni, St. varistriata 9.8 29.2 



S. Limestone, dark at bottom, gray at top, weathering 

 lighter. Contains a few Sp. vanuxemi. Opposite 4th barn 

 in ravine i.8 31.0 



9. Dark grayish-blue limestone in broken beds; some- 

 what obscured by detritus 5.2 36.2 



10. Darjc, bluish-gray solid limestone, containing a few 

 Sp. vanuxemi and forming rapids just below 3rd barn. Up- 

 per surface rough 1.8 38.0 



11. Evenly bedded limestone, some layers ift. thick 4.0 42.0 



12. Light and dark layers, shaly 6 42.6 



13. Light gray or buff colored limestone. Layers .05 to .oS 



feet in thickness. Shows stylolitic structure 2.3 44-9 



14. Light gray to drab limestone; forming falls near 2nd 



barn. Contains yellowish clay nodules 3.2 48.1 



15. Very light grayish-brown limestone. Notice dip, 



about 1-10 N. W 4.0 52.1 



16. Limestone, thick bedded 3.7 55.8 



17. Thin bedded shaly limestone; layers rather irregular; 

 forming a prominent ledge extending fully 100 ft. east of 



the tunnel 3.5 59.3 



iS. Dark and light brownish impure limestone; often irreg- 

 ularly bedded; in layers 1.5 ft. thick. Lowest beds seen at up- 

 per end of tunnel 5.0 64.3 



As a rule, the so-called Rondout beds are much lighter in color 

 and are far less fossiliferous than the Cobleskill below or the 

 typical Manlius above. They seem more like the light colored 



