672 ^y. t. lee — stratigraphy of coal fields of new Mexico 



No. Date. 



The Cretaceous is not subdivided for purposes of mapping in 

 this paper. Observations were extended eastward to include a 

 part of the valley of the Rio Puerco. but attention is directed 

 principally to the igneous rocks, and little information is given 

 as to the sedimentary formations of this valley. 



60. 188S. Stevenson, Joun J.: Some notes respecting metamorphism. Am. 



Phil. Soc, Proc., vol. 22, pp. 161-16G. 1SS5. 



Abstract, Am. Jour. Sci., 3d series, vol. 29, p. 41-4 (14 p.). 

 18S5. 



(P. 1G6) Brief reference is made to the anthracite coal of 

 Placer Mountain (Cerrillos field) and to the metamorphosed 

 coal near Trinidad and near Raton. 



61. 1886. White, Charles A. : On the relation of the Laramie molluscan 



fauna to that of the succeeding fresh-water Eocene and other 

 groups. U. S. Geol. Surv.. Bull., No. 34, pp. 301-442, 5 plates. 

 Washington, 18SG. 



Abstracts. Science, vol. 10. pp. 120-127. 1888: Popular Sci. 

 Monthly, vol. 33. p. 420 (i/o wl.), 1888. 



The relation of Laramie and Puerco is discussed and some 

 of the invertebrates from the Puerco near Nacimiento are de- 

 scribed. 

 62. ' 1889. Stevenson, John J. : The Mesozoic rocks of southern Colorado 

 and northern New Mexico. 



Am. Geol.. vol. 3. pp. 391-397. 1889. 



(Pp. 391-392) The coal-bearing rocks of the Canyon City. 

 Trinidad, Raton, and Galisteo (Cerrillos) coal fields are re- 

 ferred to the Laramie. Rocks of Fox Hills age are supposed to 

 occur below the coal near Canyon City and Trinidad, Colorado, 

 but to thin out farther to the south and are "supposed to be 

 absent" in the Galisteo area. 



63. 1890. Cope, Edward D. : (Remarks on the age and stratigraphic com- 



ponents of the Laramie group.) 



Geol. Soc. Am.. Bull., vol. 1, p. 532, 18i>0: Am. Nat., vol. 24, p. 

 569, 1890. 



The Puerco containing "about 100 species of mammalia" is 

 sj.id to rest on the Laramie, which also contains some mammals. 



64. 1890. Newberry, John S. : The Laramie group. Its geologic relation^ 



its economic importance, and its fauna and fiora. 



New York Acad. Sci., Trans., vol. 9. pp. 27-32. 1890. 



Abstract (by author). Geol. Soc. Am., Bull., vol. 1, pp. 524- 

 rr27, 527-528, 1890. with discussion by J. B. Tyrrell. L. F. Ward, 

 J. J. Stevenson, and E. D. Cope. pp. 527-532. 



Other abstracts. Am. Geol.. vol. 5. pp. 118 (M: P-^ : Am. Nat, 

 vol. 24. pp. 856-857 (% p.). 



The coal beds of New Mexico enter into the discussion only 

 incidentally. 



65. 1890. Stevenson. John J.: (Remarks on the differentiation of the Colo- 



rado group in Colorado and New Mexico.) 



