62 C. R. Longivell — Muddy Mountains, Nev. 



Lawson, A. C. : The petrographic designation of alluvial fan formations, 



Univ. Calif. Publ., BuU. Dept. Geol., vol. 7, 325-334, 1913. 

 Lee, Willis T. : A geological reconnaissance of a part of western Arizona, 



U. S. Geol. Survey Bull. 352, 1908. 

 Marvin, A. E. : Geology of route from St. George, Utah, to the Gila Eiver, 



Arizona, U. S. Geog. and Geol. Surveys W. 100th Mer., vol. 3, 



193-225, 1875. 

 Noble, L. F. : The Shinumo quadrangle. Grand Canyon district, Arizona, 



U. S. Geol. Survey BuU. 549, 1914. 

 Eobinson, H. H. : The San Franciscan volcanic field, Arizona, U. S. Geol. 



Survey Prof. Paper 76, 1913. 

 Schuchert, Charles: Paleogeography of North America, Bull. Geol. Soc. 



America, vol. 20, 427-606, 1910. 

 — On the Carboniferous of the Grand Canyon of Arizona, this Journal, 



45, 347-369, 1918. 

 Spurr, J. E. : Descriptive geology of Nevada south of the fortieth parallel 



and adjacent portions of California, U. S. Geol. Survey Bull. 208, 



1903. 

 Turner, H. W.: The Esmeralda formation, Am. Geologist, 25, 168, 1900. 

 Walcott, C. D. : Permian of the Kanab valley, Arizona, this Journal, 20, 



1880. 

 "Wheeler, G. M. : U. S. Geog. and Geol. Surveys W. 100th Mer., vols. 1 and 



3, 1875. 



