BiBLlOGRAl'HY AND NOTES 681 



No. Date. 



relation to the Mesaverde unknown — occurring also in the south- 

 western part of the field; (3) a Mesaverde group occurring on 

 the north and east parts of the field; (4) an ''upper Montana 

 group — relation to the Mesaverde unknown" — occurring in the 

 south and southeastern parts of the field; and (5) a "Laramie'' 

 group occurring in the northern and northeastern parts. 



The "Laramie" is shown from Colorado as far south as Gallinas 

 Mountains, New Mexico, and is the same as the "Laramie" of 

 other writers ; the Mesaverde extends as far south as the Puerco 

 River. The upper Montana group occurs in the southeastern 

 part of the field near Cabezon, and is the Mesaverde of later 

 writers. The other groups occur only west of the area described 

 by the writer. 



(P. 251) The Chico Arroyo district, extending from Sierra 

 Nacimiento to Mount Taylor, contains coal-bearing rocks 2,000 to 

 3,000 feet thick, which are said to lie unconformably on the 

 Mesaverde and to contain fossils which indicate that they are 

 younger than Mesaverde. These constitute the "upper Montana 

 coal group." (The "Mesaverde" and the "upper Montana coal 

 group" of Schrader together constitute the Mesaverde of Gard- 

 ner and the present writer.) 



101. 1906. Sheridan, Jo E. : Report of the mine inspector for the Territory 



of New Mexico to the Secretary of the Interior for the year 

 ended June 30, 1906. Washington, Government Printing Office, 

 1906. 87 pp. 



(Pp. 51-57) The Cerrillos and Una del Gato (Hagan) coal 

 fields are described. 



102. 1906. Sheridan, Jo E. : Present conditions and future prospects of the 



coal-mining industry in New Mexico, 



Annual Report U. S. Mine Inspector for the Territory of New 

 Mexico to the Governor of New Mexico, Santa Fe, 1906, 134 pp. 



(Pp. 66-69) The coal mines at Monero are described. Three 

 beds of coal varying from 3 to 4 feet in thickness are said to be 

 worked. 



(Pp. 70-78) The mines in the Cerrillos and Una del Gato 

 (Hagan) fields are briefly described. 



103. 1907. Campbell, Marius R. : The Una del Gato coal field, Sandoval 



County, New Mexico, U. S, Geol. Survey, Bull. no. 316, pp. 427- 

 430, 1 fig. 1907. 



The Una del Gato (Hagan) field is described principally from 

 an economic point of view. A section of the rocks measured by 

 Charles R. Keyes near Sloan mine is given. The coals are cor- 

 related with those of the Cerrillos field, and the statement is 

 made that "it is highly probable that they are Laramie." 



104. 1907. Lee, Willis T. : Note on the red beds of the Rio Grande region in 



central New Mexico. 



Jour. Geology, vol. 15, no. 1, pp, 52-58. 1907, 



(P. 57) Coal-bearing rocks near Elephant Butte, New Mexico, 



