sandstone
noun
                                                                                                                            
                                                            sand·stone
                    
                                                                                                              
                                                                                                                                  ˈsan(d)-ˌstōn 
                                                      
                                                          
            
                                
              
          
                                                      : a sedimentary rock consisting of usually quartz sand united by some cement (such as silica or calcium carbonate)                                      
                
                    
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  Merriam-Webster unabridged




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