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Amazon Basin (sedimentary basin)
The
Amazon Basin
is a major
sedimentary basin
located roughly at the middle and lower course of the
Amazon River
, south the
Guiana Shield
and north of the
Central Brazilian Shield
. The basin develops on a
rift
that originated possibly about
550 million years ago
during the
Cambrian
. Parts of the rift were reactivated during the opening of the
South Atlantic
.
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