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Evolution of Amazon Basin. Stage 1 500 Million Years Ago Gondwanaland splits into South America and Africa Pre-Cambrian rocks erode and material is transported.

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Presentation on theme: "Evolution of Amazon Basin. Stage 1 500 Million Years Ago Gondwanaland splits into South America and Africa Pre-Cambrian rocks erode and material is transported."— Presentation transcript:

1 Evolution of Amazon Basin

2 Stage Million Years Ago Gondwanaland splits into South America and Africa Pre-Cambrian rocks erode and material is transported by rivers where they were compressed into sandstone Inland lake forms which drains into the Pacific creating a build up of sediment at the Delta

3 Stage 2 90 Million Years Ago South America moves West away from Africa running into the Nazca Plate Nazca Plate subducted and forces sedimentary material deposited in Delta to rise – Creates fold mountains (Andes) North and East buckle to create a basin

4 Stage 3 10 Million Years Ago Amazon River changes directions and flows towards the Atlantic Volcanoes and magma aid in building up the Andes

5 Stage 4 2 Million Years Ago Ice Age Carves of sedimentary rock Much of the eroded material is washed down into the basin formed by the North and East buckling

6 Stage 5 Present Tributaries bring sediment to the Amazon Basin Upper regions of Andes erosion creates fast flowing river – Creates deep V-shaped valleys Amazon Basin develops large flood plains due to seasonal flooding Meandering occurs due to flat relief


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