- Clay soil (60% clay, 40%
- useful sand, and 10% silt)
- with chipped pine matrix
- (10% of total mix). Bricks
- exposed to direct flames at
- 1300°F for 8 minutes.
- Bricks crushed with 100lbs of
- force x three and exposed to
- winter weather for 30 days.
- Clay soil that is partly
- vitrified remains intact,
- while raw soil has eroded.
- Charred wood is in tact,
- while green wood has signs
- of decay.
- Image credit:
- Jana VanderGoot, 2021