Unlike with many other hilltop forts in the area, there are no signs of vitrification in the stone.
The timber lacing caught fire and burnt with such intensity that the surrounding stonework melted, or vitrified.
This rubble was mostly ceramic material that had been created as the raw clay used in the daub of the walls became vitrified from the intense heat that would have turned it a bright orange color during the conflagration that destroyed the buildings, much the same way that raw clay objects are turned into ceramic products during the firing process in a kiln.
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