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



No. Date. 



52. 1S81. Stevenson, John J. : Note on the Laramie group of southern New 



Mexico. Am. Jour. Sci., 3d series, vol. 22, pp. 370-372. 1881. 



(P. 370) The statement is made that the "Laramie" beds are 

 practically continuous from Galisteo Creek southward for 150 

 miles. (This is an error probably arising from the fact that 

 coal occurs near a "San Pedro," about 10 miles south of the 

 Galisteo, and also near another "San Pedro," about 150 miles 

 to the south. The coal near San Pedro and San Antonio re- 

 fiirred to by J. M. Robinson, whom Stevenson quotes, is prob- 

 ably the coal of the Tijeras field, but it is not certain how 

 much of the description refers to this field and how much to 

 the Carthage field near the "San Pedro" farther to the south.) 



(P. 371) Ostrca congesta was observed "high up in the Lara- 

 mie" of the Cerrillos field, and Ostrea glaltra, Anomia, Corhula 

 S species, Camptonectes ?, and Tellina ? were obtained from the 

 coal measures near San Pedro (probably from the Tijeras field) 

 and identified by R. P. Whitfield. 



53. 1881. Stevenson, John J. : Report on geological examinations in south- 



ern Colorado and northern New Mexico during the years 1878 

 and 1879. United States geographical surveys west of 100th 

 meridian, in charge of G. M. Wheeler, Reports, vol. Ill, Supp., 

 420 pages, plates, 3 maps, 4°. Washington, 1881. 



(Pp. 126-130) The "Galisteo coal field" (Cerrillos field) is 

 briefly described and a detailed section of the coal-bearing rocks 

 near the "western edge of area" is given, and the coal-bearing 

 rocks are referred to the Laramie. 



(P. 132) The subdivisions of Lower, Middle, and L'pper Cre- 

 taceous are adopted, but Upper Cretaceous is here made equiva- 

 lent to No. 5 (Fox Hills) and a part of No. 4 (Pierre), and 

 Middle Cretaceous is made to include part of No. 4. On the 

 maps Middle Cretaceous is labeled Colorado. 



(P. 133) The coal beds of the Galisteo area are correlated 

 directly with those of southern Colorado (Trinidad field) and 

 with those of northern Colorado (Denver field) and Wyoming. 



(P. 145) The writer states that Newberry regarded the coal 

 beds near Chama and farther to the north and west as younger 

 than those of the "Galisteo coal beds." 



(P. 145) The Galisteo coal beds are correlated with New- 

 berry's Upper Cretaceous of the Chama region (Newberry him- 

 self had referred them to Middle Cretaceous). 



Cope's description of the rocks near Chama in the Wheeler 

 reports (Nos. 26 and 36 of this list) is quoted as proof that 

 Cope was describing the Upper Cretaceous of Newberry. Ste- 

 venson uses this for correlating with his Laramie. (P. 155) 

 Inoceramus and Ostrea were found in the "Laramie" of the 

 Galisteo area. 



(Pp. 159-162) The Galisteo sandstone is referred to the Ter- 

 tiary. (The description and the mapping indicates that the 

 writer's Galisteo is quite different from the Galisteo of other 



