geological map red river rio de blake william (3 résultats)

Etat : Very good. Full title: Geological Map of the Route Explored by Capt. Jno. Pope Corps of Topl. Engrs. Near the 32nd Paraellel of North Latitude, 1854, from the Red River to the Rio Grande. Prepared in the Office of Pacific Rail Road Exploration and Survey, War Department by William P. Blake. 11.25" x 24.5" (sheet size). Folding creases, otherwise very good. Shows the route from Fort Towson, Oklahoma, to El Paso and Dona Anna on the Rio Grande and includes much of the region's watershed, including the Rio Grande, Concho, Brazos, Trinity, and Red Rivers. An "index of colors" indicates various rock and mineral deposits and formations.

Other. Original lithograph, hand colored in wash when published. This early geological map depitcs the Witchita Mountains in the north, El Paso in the west to the Missisippi River in the east and the Gulf of Mexico in the south. At the left side with find a color explanation key for the various geological formations. On the upper left side is the cartouche with the mileage scale. This geological map was prepared to accompany Blake's report of the transcontinental railroad. The map was originally folded, the old folds are visible. In excellent condition. 563 by 400mm (22¼ by 15¾ inches).

22 3/4 x 10 inches. Etat : Very good condition. This is a finely detailed map of the geology encountered between the Rio Grande River and the Red river during the 32nd parallel survey. It is based in a riverine underlying map. The majority of the findings was a Ccrustceous base. The map goes from Ft. Towson to El Paso. Around Ft, Belknap is found a Carboniferous sandstone. The expedition was an early attempt to locate a southern based route for a railroad to the Pacific Ocean. It was supported by influence of senators and Representatives of the Southern States.