Alarcón, Hernando de

Alarcón, Hernando de

(ārnän`dō dā älärkōn`), fl. 1540, Spanish explorer in the Southwest. He was given command of a fleet that was supposed to support the land expedition of Francisco Vásquez de CoronadoCoronado, Francisco Vásquez de
, c.1510–1554, Spanish explorer. He went to Mexico with Viceroy Antonio de Mendoza and in 1538 was made governor of Nueva Galicia.
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. In the summer of 1540 he sailed up the Gulf of California; proved definitely that Lower California was a peninsula, not an island; and discovered the Colorado River. He failed, however, to make contact with Coronado's expedition. He explored the river a few months before García López de CárdenasCárdenas, García López de
, fl. 1540, Spanish explorer in the Southwest. A member of the 1540 expedition of Francisco Vásquez de Coronado, he was selected to lead a party from Cibola (the Zuñi country of New Mexico) to find a river of which the
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 discovered the Grand Canyon.