Residual combustion phase
n. A glowing or incandescent form of combustion that follows the smoldering combustion phase.
Little or no visible smoke is observed during the residual combustion phase, but large amounts of carbon monoxide and carbon dioxide are often produced. The residual combustion phase may last for extended periods of time and generally results in the consumption of duff and down dead woody debris larger than two inches in diameter. See Hardy and others 2001 for further discussion.