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          This image appeared on Wikipedia's  Main Page in the  Did you know? column on 3 May 2008. | 
          
           
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        Summary 
        
         
          
           | Description | 
           
             English:  Crater Lake is a caldera lake in the U.S. state of Oregon. It is the main feature of Crater Lake National Park and famous for its deep blue colour and water clarity. The lake partly fills a nearly 4,000 feet (1,220 m) deep caldera that was formed around 5,677 (± 150) BC by the collapse of the volcano Mount Mazama. 
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           | Date | 
           Monday, July 17, 2006 5:30:48 PM | 
          
          
           | Source | 
           Own work | 
          
          
           | Author | 
            Zainubrazvi | 
          
         
         
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             Permission is granted to copy, distribute and/or modify this document under the terms of the  GNU Free Documentation License, Version 1.2 or any later version published by the  Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled  GNU Free Documentation License.  http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue 
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