00893cam a22002411 4500 gs 06000451 DLC 20260227111303.0 781102s1868 paub 000 0 eng gs 06000451 (OCoLC)4340744 DLC IGK DLC premarc QE79 .L3 Le Conte, John Lawrence, 1825-1883. Notes on the geology of the survey for the extension of the Union Pacific railway, E. D., from the Smoky Hill river, Kansas, to the Rio Grande. By John L. Le Conte ... Philadelphia [Review printing house] 1868. 76 p. front. (fold. map) diagrs. 23 cm. "Catalogue of rocks, by Dr. F. A. Genth": p. 69-76. Geology West (U.S.) Union Pacific Railroad Company. Genth, F. A. (Frederick Augustus), 1820-1893. 24431 24431