BIBLIOGRAPHY AND NOTES 677 



No. Date. 



Jour. Geol., vol. 10, pp. 36-58, 7 figs. 1902. 



The Exeter sandstone is named and described in this paper. 



82. 1902. Storrs, L. S. : The Rocky Mountain coal fields. U. S. Geol. Surv., 



22d Ann. Kept., pt. 3, pp. 415-471, 2 pis., 1 fig. 1JX)2. 



The coal beds of the San Juan Basin and of the Cerrlllos and 

 Hagan fields are referred to the Laramie and the coal of the 

 latter two is said to lie "under the Tertiary beds." 



83. 1903. Johnson, D. W. : Geolog>^ of the Cerrillos Hills, New Mexico. 



Part I, General geology; part II, paleontology; part III, petrog- 

 raphy. 



School of Mines Quart., vol. 24, pp. 303-350, 7 pis., 7 figs. ; pp. 

 456-500, 10 pls„ 6 figs,, 1003 ; pp. 173-246, 14 pis., 1903 ; vol. 25, 

 pp. 69-98, 5' pis., 1903. 



The reports result from the work done in 1899-1902. Among 

 others the following propositions are supported : 



(1) The Santa Fe marls of Ilayden . . . represent the 

 time from the early Loup Fork Tertiary to the Recent period. 



(2) The Galisteo Group of Hayden consists of red beds of 

 late Cretaceous, probably Laramie age. 



(3) The coal series, or Madrid Group, is of Fox Hills age. 



(4) Pierre, Benton, and probably Dakota and Jura-Triassic 

 beds, are also present in the district. 



(Vol. 24, pp. 336-3.38) The Galisteo sandstone is referred 

 doubtfully to the Laramie and is described as consisting of red 

 sedimentary rocks similar lithologically to the older "Red 

 Beds," and lying conformably (.? see discussion on this point in 

 the present paper) on the Madrid group. They contain fossil 

 wood which, according to F. H. Knowlton, indicates a species 

 of QucrcKS and is evidently of Upper Cretaceous or later age. 



(Pp. 338-344) The Madrid Coal Group is described as 1,500 

 to 2,000 feet thick. The coal is said to be in the lower part of 

 this group. The author's figure 5 makes the base of the group 

 rest on the lowest sheet of intrusive igneous rock at Madrid 

 and places the rocks below this sheet in the Pierre. (This 

 would place in the IMerre below the Madrid group a considerable 

 thickness of sandstone and several thin beds of coal which 

 obviously belong in the Madrid or coal-bearing formation.) 

 The base of the Madrid group is obviously drawn but little 

 below the coals that have been mined, for the writer states 

 (p. 340) that "the coal in the lower portion of the Madrid 

 group has proven of great interest to geologists, and so many 

 references have been made to it," etcetera. 



(Pp. 344-347) The Pierre group is described as consisting of 

 shale and sandstone. A section (p. 346) places 162 feet of 

 sandstone above the dark-colored shale (Mancos) in the Pierre. 



(P. 347) No undoubted Niobrara was found, but the Benton 

 and Dakota occur. 



(Pp. 477-493) The economic features of the coal are described. 

 Fossil leaves, identified by Knowlton (p. 178, Paleontology) as 



