In my home town nearby, they found a roman villa & bath house with fantastic mosaics whilst building a new supermarket. They just buried it again and built over it.
I'd rather it was preserved and/or extracted, but shows that the presence of such artifacts needn't be a reason to stop block at all.
	
	
		
			
				
			
			
				
				Archaeologists say the remains uncovered in Olney, Buckinghamshire, are of "high significance".
				
					
						
							 
						
					
					www.bbc.com
				
 
			 
		 
	 
But it also shows just how common these types of findings are, that they just get reburied again.