664 W. T. LEE STRATIGRAPHY OF COAL FIELDS OF NEW MEXICO 



No. Date. 



United States geological and geographical survey of the Ter- 

 ritories, embracing Colorado, F. V. Hayden in charge (7th) an- 

 nual report (for 1873), pp. 427-444, plates. Washington, 1874. 



The literature of "The Fort Union or Lignitic Group" is re- 

 viewed. In this group are included (p. 432) the Placer Moun- 

 tain (Cerrillos) coal beds, which are referred to the Cretaceous 

 "near No. 5" (Fox Hills). 



23. 1874. Cope, Edwaed D. : (On the Cretaceous age of the lignite of the 



West. ) 



Philadelphia Acad. Sci., Proc, vol. 26, pp. 10-11, 12-13. 1874. 

 Remarks by Le Conte and Frazer, p. 11. 



The author finds evidence of Cretaceous age in the "lignitic 

 beds" of northern Colorado and Le Conte states that coal beds 

 in New Mexico are also Cretaceous. 



24. 1874. Cope, Edwaed D. : Review of the Vertebrata of the Cretaceous 



period found west of the Mississippi River. 



United States geological and geographical survey of the Ter- 

 ritories, F. V. Hayden in charge, Bull. (vol. 1, 1st series) No. 2, 

 pp. 5-48. Washington, 1874. 



Hayden's reference of the "Placer Mountain" coal beds to the 

 base of his Tertiary lignitic group is quoted and the statement 

 is made that "they are nearer to No. 5 (Fox Hills)." 



25. 1874. Cope, E. D. Report on the vertebrate paleontology of Colorado. 



United States geological and geographical survey, F. V. Hay- 

 den in charge, (7th) annual report (for 1873), pp. 444-533, 

 plates. Washington, 1874. 



26. 1874. Cope, Edwaed D. : Notes on the Eocene and Pliocene lacustrine 



formations of New Mexico, including descriptions of certain 

 new species of Vertebrata. 



Geographic explorations and surveys west of the 100th 

 meridian, by Wheeler, annual report, U. S. Army, Chief of 

 Engineers, Annual Report for 1874, Appendix FF, pp. 115-130, 

 Washington, 1874. (This is not Appendix FF of the Engineer's 

 report, vol. II, 1875.) 



Abstract, Am. Jour. Sci., 3d series, vol. 9, p. 151 (i p.). 1875. 



(P. 116) The Eocene in the vicinity of the Chama River is 

 described as resting unconformably on coal-bearing rocks which 

 occur below fossiliferous marine rocks of Cretaceous age. 



27. 1874. Hayden, F. V.: (General report.) 



United States geological survey of the Territories, embracing 

 Colorado, F. V. Hayden in charge, (7th) Annual Report for 

 1873, pp. 17-82. Washington, ]S74. 



Abstract, Am. Nat., vol. 9, pp. 173-177. 1875. 



(P. 27) The coal beds of western New Mexico are included 

 with others of Cretaceous age. 



28. 1874. Hayden, F. V.: Remarks on age of lignitic group. 



United States geological and geographical survey of the Ter- 



