Personal Narrative Of Travels To The Equinoctial Regions Of America During The Years 1799-1804 - Volume 3 - By Alexander Von Humboldt And Aime Bonpland.
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I Observed, When Speaking Of El
Dorado De Canelas, The Omaguas And The Iquiare, That Almost All The
Rivers Which Flow From The West Wash Down Gold In Abundance, And Very
Far From The Cordilleras.
From Loxa to Popayan these Cordilleras are
composed alternately of trachytes and primitive rocks.
The plains of
Ramora, of Logrono, and of Macas (Sevilla del Oro), the great Rio Napo
with its tributary streams* (the Ansupi and the Coca, in the province
of Quixos (* The little rivers Cosanga, Quixos, and Papallacta or
Maspa, which form the Coca, rise on the eastern slope of the Nevado de
Antisana. The Rio Ansupi brings down the largest grains of gold: it
flows into the Napo, south of the Archidona, above the mouth of the
Misagualli. Between the Misagualli and the Rio Coca, in the province
of Avila, five other northern tributary streams of the Napo (the
Siguna, Munino, Suno, Guataracu, and Pucono) are known as being
singularly auriferous. These local details are taken from several
manuscript reports of the Governor of Quixos, from which I traced the
map of the countries east of the Antisana.)), the Caqueta de Mocoa as
far as the mouth of the Fragua, in fine, all the country comprised
between Jaen de Bracamoros and the Guaviare,* (* From Rio Santiago, a
tributary stream of the Upper Maranon, to the Llanos of Caguan and of
San Juan.) preserve their ancient celebrity for metallic wealth. More
to the east, between the sources of the Guainia (Rio Negro), the
Uaupes, the Iquiare, and the Yurubesh, we find a soil incontestably
auriferous.
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