adjective
- converted into or transformed into coal; having undergone the process of coalification
Usage: geology; technical
Examples
- The coalified remains of ancient forests can be found in deep underground deposits.
- Geologists studied the coalified plant material to understand the region's prehistoric climate.
- Over millions of years, the organic matter became coalified under intense pressure and heat.
- The coalified layers in the rock formation revealed evidence of Carboniferous swamps.