The hill fort Tap O Noth lies on a hill top in Aberdeenshire, Scotland.  Along the fort is a vitrified wall, a wall heated to such an intensity, for a period of time, that it becomes like glass. Among artifacts found at the fort are a stone axe, dated to somewhere between 2,000 BC and 800 BC, as well as a bronze ring, dated to between the First and Third centuries AD.

Fifty examples of vitrified forts have been found in Scotland, and their presence is a great mystery since it is unclear how or why they would have been heated to such an extent that the surface of the stone turned to glass.

Robert Schoch, a geologist, after having examined some of these vitrified forts,  wrote an article in New Dawn magazine. He states that temperatures of 1,000 degrees centigrade (1,832 fahrenheit) are required to vitrify rock.

The forts…