illuviation
noun
                                                                                                                            
                                                            il·lu·vi·a·tion
                    
                                                                                                              
                                                                                                                                  i-ˌlü-vē-ˈā-shən 
                                                      
                                                          
            
                                
              
          
                                                      : accumulation of dissolved or suspended soil materials in one area or horizon as a result of eluviation from another                                      
                
                    
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  Merriam-Webster unabridged




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