the United States. The Rio-grandee to taosa

you are: the United States

Eleven persons and set of animals have paid with a life during expedition, and Fremoptu it was necessary to refuse the plan. Fremont has proceeded downwards across Rio Grande to Taosa and has reached California southern by, through Santa Cruz and Tuskon (Takson).

The Further studying of the southwest has promoted thanks to a number of the geodetic shootings undertaken in the same years. In 1849 Simpson made works to the West from Rio Grande, and Marsi investigated district to the east from it, on border with New Mexico and Texas. The same year to shooting of Texas under the command of the colonel of Johnston, captured the most part of territory of staff the large topographical group has started the south from 34th parallel and to the West from 96 ° z. d. Same year border shooting between the United States and Mexico has begun. Works proceeded till 1856 and have given much for knowledge of geography and geology of this part of America.

During the same period the attention of researchers was involved in itself with the river Colorado. In 1851 captain Sitgrivs has crossed a part of the Big Koloradsky plateau between the river Zuni and mountains San Franciscos and, continuing to go in the western direction, has reached the rivers Colorados and has proceeded downwards on it to JUmy. The same year the lieutenant of Derby has risen by a boat across Colorado to JUmy.

After research of sources of the river Red, spent Marsi in 1852, the general structure of a relief of the southwest became clear. An exception there was only a river Colorado, works on which have renewed only in 1857