Vitrified Scottish Iron Age forts show evidence of artificial heat treatment. Vitrification of stone requires temperatures around 1,200°C Royal Society of Edinburgh concluded in 1780 that vitrification was artificial, not natural Archaeologist Ian Rolston's 1980 experiment with replica Iron Age wall and 22-hour timber fire reached only 800°C

🔥 Fascinating puzzle: dozens of Scottish Iron Age hillforts show vitrified stone. A 1980 replica experiment with a 22-hr timber fire only reached ~800°C, well below what was previously thought necessary. New research suggests melting began HIGH on walls & spread inward — but heat came from OUTSIDE. Timberlacing channels distributed the fire's heat through the structure. Partially understood!

Key facts:

- Vitrification of stone can occur at temperatures around 1,100-1,200°C (about 2,000°F), though the exact mechanism remains debated

- Early observers including the Royal Society of Edinburgh noted the artificial nature of vitrification in the 18th century

- Archaeologist Ian Rolston's 1980 experiment with replica Iron Age wall and 22-hour timber fire reached only ~800°C

- Vitrification patterns show melting beginning high within walls and spreading downward, affecting both interior and exterior surfaces

- Heat was distributed through timberlacing channels within the stone structure

Key Facts

  • Vitrification of stone requires temperatures around 1,200°C
  • Royal Society of Edinburgh concluded in 1780 that vitrification was artificial, not natural
  • Archaeologist Ian Rolston's 1980 experiment with replica Iron Age wall and 22-hour timber fire reached only 800°C
  • Vitrification patterns show melting beginning high within walls and spreading downward, primarily affecting interior rather than exterior
  • Heat appeared to originate from within, concentrated around internal structures
  • Lightning theory ruled out due to absence of fulgarites (glass tubes)
  • Phenomenon remains unexplained across dozens of Scottish fort sites

Source: Melted Ancient Ruins Scientists Can't Explain by Universe Inside You