Southernmost South America, including over half of the territory of
the Argentine Republic, consists chiefly of a cool, open plains
country. Northward of this country, and eastward of the Andes, lies
the great bulk of the South American continent, which is included in
the tropical and the subtropical regions. Most of this territory is
Brazilian. Aside from certain relatively small stretches drained by
coast rivers, this immense region of tropical and subtropical America
east of the Andes is drained by the three great river systems of the
Plate, the Amazon, and the Orinoco. At their headwaters the Amazon and
the Orinoco systems are actually connected by a sluggish natural
canal. The headwaters of the northern affluents of the Paraguay and
the southern affluents of the Amazon are sundered by a stretch of high
land, which toward the east broadens out into the central plateau of
Brazil. Geologically this is a very ancient region, having appeared
above the waters before the dawning of the age of reptiles, or,
indeed, of any true land vertebrates on the globe. This plateau is a
region partly of healthy, rather dry and sandy, open prairie, partly
of forest. The great and low-lying basin of the Paraguay, which
borders it on the south, is one of the largest, and the still greater
basin of the Amazon, which borders it on the north, is the very
largest of all the river basins of the earth.
Pages:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25