Link to Stone Structures animation
Click on the screenshot above to view the "Stone Structures" animation by Laszlo Lipot
 

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Everything that is made from resistant materials has some form of structure.  

Stone structures consist of shaped stones laid in layers, one on top of the other. The stones are laid so that the one overlaps the two beneath it. This arrangement helps to hold the structure together.  The stones may have mortar in between them or they may be laid "dry".

View large picture of Machu Picchu stone work

 
Copyright Laszlo Lipot.