The layer covering the apothecia is about 30 m thick, and made of blackened (carbonized) cells measuring 56 m in diameter.
The carbonized particles are then activated by exposing them to an oxidizing agent, usually steam or carbon dioxide at high temperature.
A lucky find is a vessel from a pit containing the carbonized rests of a gruel made inter alia of acorns and meat.
The scrolls are badly carbonized, but a large number have been unrolled, with varying degrees of success.
A large voltage difference gradually creates a conductive leakage path across the surface of the material by forming a carbonized track.
Carbonized plant seeds were found in hearths and living areas.
A very lightweight whorl fabricated of coyol palm may indicate more specialized spinning, and a carbonized wooden spindle and bone needles rounded out the spinning-and-weaving tool kit.
In addition, the core yielded a significantly larger volume of carbonized materials, in spite of the fact that a greater number of flotation samples were recovered from the peripheral zone.
