USGS - science for a changing world

Third Layer of Lead Bricks for Gamma-Ray Castle

(as viewed from above with front of castle at bottom)

Third Layer

Third layer of bricks (magenta) is level with the top of the outer bricks (green) which are positioned vertically along the outer edge of layer 1.  This layer forms the floor of the castle.  Each brick is 8" by 4" by 2".

For more information about this report contact: Stephen L. Snyder or Joseph S. Duval
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