charcoal

These contained large quantities of tree ferns, but also other types of plants, and charcoal.

Archaeologists found traces of ash, charcoal, and what they believe may be tar crystals, as well as elements such as zinc and copper in the Vanguard Cave hearth.

A team of researchers from the UK and Australia analysed charcoal and pollen contained in ancient mud to determine how Aboriginal Tasmanians shaped their surroundings.

But in the sediment core, the amount of charcoal debris—an indicator of fire burning nearby plants—more than doubled earlier than that time, starting about 41,600 years ago.

In a forest close to Roriak, a group of men and women chop down trees to make charcoal.