STEATIGRAPHY OF TDE LIGNITIC FORMATIONS. 13 



ing along the base of Uie inoiinfaiiis iVoin tlic Raton to Cheyenne, and thence 

 along the Union Pacific Railroad to Evanston— I shall especially quote from 

 these observations given in detail in Dr. Haydcn's Annual Report for 1872. 

 Perhaps one of the finest exposures of the Lower Lignitic Measures in 

 regard to its relation to the Cretaceous is that of the base of the Raton 

 Mountains, a few miles south of Trinidad, and that of the bluffs on the Pur- 

 gatory River, opposite this last place, and mentioned above. The l)ase of tlu; 

 Raton is composed of a series of heavy, mostly whitish, sandstone, which is 

 conformably superposed to the black shales of the Cretaceous No. 4. This 

 sandstone is also conformably overlaid by the productive Lignitic. The 

 whole section, being fully exposed from top to base, is as follows:* — 



LIGNITIC. 



Ft. In. 



1. Sandstone and shale covered with pines ^0 



2. Soft shale alternating with soft clay (soapstone) 35 



3. Outcrop of lignite, indifferent 2 



4. Soft shale and fire-clay -^ ^^ 



5. Lignite outcrop, thin 



6. Hard gray shale with fossil plants at basef 30 



7. Shaly hard sandstone in l)ank ^ 



2 



8. Soapstone shale 



9. Lignite outcrop, good 



10 Fire-clay and shale ^^ ^ 



11. Lignite bed, exposed 



12. Fire-clay ^ ^ 



13. Soft shale 2^ ^ 



14. Lignite, opened 



15. Fire-clay ^ " 



16. Ferruginous and slialy sandstone, covered '^^ ^^ 



300 G 



SANDSTONE. 



17. Brown-reddish shaly sandstone, with debris of land vegetables. 37 



18. Yellow shaly sandstone full of Fucoids ^ ^ 



• Annual Report, 187-2, p. 319. 



I At a hUoi t (libtancf, tlm sliulo passes* to HanilHtoiif, No. 7. 



