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By: XXXXXXX This is the button to click to return to this slide. Location Age Rock Cycle Composition Formation The Future Bibliography Click screen for a diagram of the countries that the Andes' run through. Click the Geographic screen to go Entire Western Coast of South America back Spans through seven countries -Venezuela, Columbia, Ecuador, Peru, Bolivia, Chile, and Argentina 4500 miles long The seven Tectonic Location countries that the Andes Runs Mountains run the entire western coast of South America through Click for Tectonic Location Click for picture Andes Mountains •Andes Mountains are on the South American plate. South American Plate •Nazca and South American plate collided causing the Andes Mountains •Nazca plate is subducting below the South Nazca Plateplate American Andes aerial view •Nazca crust is scraped off adding height Click the Back to Location screen to go back Tectonic Diagram This diagram shows how over a long period of time, the Nazca plate subductes Nazcaunder plate collided with South American slowly the South American plate plate. The farther it Click For Picture subductes, the bigger the -Nazca plate-Oceanic Crust Andes mountains grow and they begin to formAmerican plate-Continental -South around 60 million years ago. As crust melts, it the Nazca subducted under South American plate becomes less dense and to Volcanic moves the surface mountains formed creating a volcano. -Crust melted creating magma that rose to surface creating volcanos Click the screen to go back. Andes Mountains were created Boundary where the plates meet creating the Andes Mountains Back to Tectonic Location MYA= Millions of Years Ago 140 MYA-Nazca plate subducted under South American Plate Andes Mountains began to from 45 MYA Formed 95 MYA after the subduction process happened Andes Mountains in Chile. Destructive Force Subduction is occurringNazca plate subducting under South American plate. Convection currents cause the plates to move. The force of the oceanic and continental plates are causing mountains to form. The quick melting of the crust causes it to become less dense and rise to the surface creating volcanic mountains. Sedimentary Rocks make up the majority of the range. -Sandstone (Clastic) -Siltstone (Clastic) -Shale (Clastic) -Limestone (Chemical) Limestone on a mountain Layers of sandstone create parts of the Andes Mountains. I think that the Andes Mountains will continue to slowly grow because the Nazca Plate is still slowly subducting under the South American Plate. Also weathering will erode the mountains making them smaller. As long as the Nazca plate is still subducting below the South American Plate, then I think there will be volcanoes forming in the Andes Mountains and erupting. "Geological History of the Andes." Andean Summits. Portable Design, n.d. Web. 26 Oct. 2013. LiveScience. N.p., 14 Mar. 2103. Web. 1 Oct. 2013. <http://www.livescience.com/27897-andesmountains.html>. Plate Tectonics. N.p., 1 Oct. 2013. Web. 1 Oct. 2013. <http://www.platetectonics.com/oceanfloors/an des.asp>. Science Daily. N.p., 2013. Web. 10 Oct. 2013. <http://www.sciencedaily.com/releases/2009/05 /090515191558.htm>.