Personal Narrative Of Travels To The Equinoctial Regions Of America During The Years 1799-1804 - Volume 2 - By Alexander Von Humboldt And Aime Bonpland.
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If We Were Authorized,
From Other Geological Facts, To Regard The Three Great Plains Of The
Lower Orinoco, The Amazon,
And the Rio de la Plata as basins of
ancient lakes,* (* In Siberia, the great steppes between the Irtish
and
The Obi, especially that of Baraba, full of salt lakes (Tchabakly,
Tchany, Karasouk, and Topolony), appear to have been, according to the
Chinese traditions, even within historical times, an inland sea.) we
should imagine we perceived in the plains of the Rio Vichada and the
Meta, a channel by which the waters of the upper lake (those of the
plains of the Amazon) forced their way towards the lower basin, (that
of the Llanos of Caracas,) separating the Cordillera of La Parime from
that of the Andes. This channel is a kind of land-strait. The ground,
which is perfectly level between the Guaviare, the Meta, and the
Apure, displays no vestige of a violent irruption of the waters; but
on the edge of the Cordillera of Parime, between the latitudes of 4
and 7 degrees, the Orinoco, flowing in a westerly direction from its
source to the mouth of the Guaviare, has forced its way through the
rocks, directing its course from south to north. All the great
cataracts, as we shall soon see, are within the latitudes just named.
When the river has reached the mouth of the Apure in that very low
ground where the slope towards the north is met by the counter-slope
towards the south-east, that is to say, by the inclination of the
plains which rise imperceptibly towards the mountains of Caracas, the
river turns anew and flows eastward.
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