Are you ready to make some noise? Wait, not that sort of rock. Today, we"re all about granite, limestone, and slate. There are three types of rock: igneous rocks formed from magma and lava; sedimentary rocks made from a mixture of particles like sand and mud; and metamorphic rocks that are the result of heat and pressure on other kinds of rock.
International Rock Day
Today in History
More Desktop Wallpapers:
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Singing praises of the oceans
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Burrowing owls
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Surfer s paradise
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World Wildlife Day
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Eben Ice Caves, Upper Peninsula, Michigan
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It s time to fall back
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The largest living organism on Earth
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Presidents Day in America’s front yard
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Detroit Industry Murals by Diego Rivera
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Fallow deer, Bradgate Park, Leicestershire, England
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Happy St. Patricks Day!
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World Sea Turtle Day
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American Wetlands Month
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Defying gravity on a swing ride
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Stuben am Arlberg, Austria
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The migrating monarchs of Michoacán
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High alpine color in Colorado
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Red lechwe, Okavango Delta, Botswana
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International Day of Mangrove Conservation
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Summer Olympics begin in Paris
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Black History Month
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A hero for the 21st century
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Oh, to sleep under the northern lights
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Infrared Jupiter, erupting Io
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Take the Stairs Day
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Lands End, Cornwall, England
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Breaking the fast for Eid
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European beech forest, Belgium
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Hidden beauty in Thailand
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Autumn in Piedmont
Bing Wallpaper Gallery

