Perito Moreno Glacier is located 48 miles from the town of El Calafate. This Glacier is a huge tourist attraction and can be seen by boat on Lake Argentino or by three viewing areas on land. This glacier is the third largest reserve of fresh water and periodically chunks of the glacier fall into Lake Argentino. While the majority of glaciers around the world, this glacier is actually advancing. This is especially remarkable because of all the talks about "global warming." Although pieces of ice break off, it still gains more ice than it is losing. Most glaciers melt into the ocean but this one melts into a lake and this process is called calving. The Perito Moreno Glacier also abrade rock and debris from their substrate to create landforms such as cirques and moraines. Glacial ice has a distinctive blue tint because it absorbs some red light due to an overtone of the infrared OH stretching mode of the water molecule. Liquid water is blue for the same reason. The blue of glacier ice is sometimes misattributed to Rayleigh scattering due to bubbles in the ice
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