Question

2. How is the Amazon basin formed?​

Answer 1

Explanation:

Fifteen million years ago, the Andes were formed by the collision of the South American plate with the Nazca plate. The rise of the Andes and the linkage of the Brazilian and Guyana bedrock shields, blocked the river and caused the Amazon to become a vast inland sea.

Answer 2

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➢ As South America shifted westward it collided with the Nazca plate which was moving east. The collision pushed up the softer sedimentary rock along the western boundary to form fold mountains-the Andes. At the same time land in the north and east buckled, forming a basin.

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