Andes mountains

Sunday, September 29, 2013
08-nevado-35

The uplift of the Andes mountains over millions of years has been due to a combination of plate tectonics and volcanism. Tectonic plates are sections of the earth’s crust that are in…

Read More

Tropical glaciers

Sunday, September 29, 2013
32-qoyllur riti-15

The Andes are topped by the largest concentration of ice anywhere in the Earth’s tropics (the belt around the middle of the planet, between 30 degrees North and 30 degrees…

Read More

Tropical Andes

Sunday, September 29, 2013

The uplifting of the Andes Mountains formed an unusual ecosystem on the eastern slope of the range, where the headwaters of the Amazon River system lie. The east-west winds that blow over South America pick up…

Read More