Geysers on the Martian South Pole

A new study reveals that the dark spots observed on the Martian South Pole are in fact zones when pressurized gas and particles of dust have eruped ,geyser-like,from beneath the dry ice formed from carbo dioxide.The dry ice is translucent enabling penetration of  sunlight  and as the sunlight is absorbed by the soil it warms the ice from bottom up . The frozen carbon dioxide sublimates forming a layer of gas trapped between the ice and the ground. The pressure of the gas builds up until the gas escapes through a vent in the ice, creating a geyser of carbon dioxide and sediment.
http://www.seedmagazine.com/news/2006/08/martian_pole_dotted_with_carbo.php?utm_source=seedmag-main&utm_medium=rss

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