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            Polygonal systems formed by thermal contraction cracking are complex landscape features widespread in terrestrial periglacial regions. The manner in which cracking occurs is...
          
        
       
        
      
           
              
                     
              
           
      
           
      
      
      
      
        
          
            
          
        
      
    
   
	      
	        
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            Polygonal systems formed by thermal contraction cracking are complex landscape features widespread in terrestrial periglacial regions. The manner in which cracking occurs is...
          
        
       
        
      
           
              
                     
              
           
      
           
      
      
      
      
        
          
            
          
        
      
    
   
	      
	        
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            Polygonal systems formed by thermal contraction cracking are complex landscape features widespread in terrestrial periglacial regions. The manner in which cracking occurs is...
          
        
       
        
      
           
              
                     
              
           
      
           
      
      
      
      
        
          
            
          
        
      
    
   
	      
	        
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            Polygonal systems formed by thermal contraction cracking are complex landscape features widespread in terrestrial periglacial regions. The manner in which cracking occurs is...
          
        
       
        
      
           
              
                     
              
           
      
           
      
      
      
      
        
          
            
          
        
      
    
   
	      
	        
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            Polygonal systems formed by thermal contraction cracking are complex landscape features widespread in terrestrial periglacial regions. The manner in which cracking occurs is...
          
        
       
        
      
           
              
                     
              
           
      
           
      
      
      
      
        
          
            
          
        
      
    
   
	      
	        
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            Polygonal systems formed by thermal contraction cracking are complex landscape features widespread in terrestrial periglacial regions. The manner in which cracking occurs is...
          
        
       
        
      
           
              
                     
              
           
      
           
      
      
      
      
        
          
            
          
        
      
    
   
	      
	        
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            Polygonal systems formed by thermal contraction cracking are complex landscape features widespread in terrestrial periglacial regions. The manner in which cracking occurs is...
          
        
       
        
      
           
              
                     
              
           
      
           
      
      
      
      
        
          
            
          
        
      
    
   
	      
	        
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            Polygonal systems formed by thermal contraction cracking are complex landscape features widespread in terrestrial periglacial regions. The manner in which cracking occurs is...