secretinite

n

an inertinite maceral occurring as round, ovoid, or oblong bodies, without obvious plant structure, vesicled to non-vesicled, sometimes containing characteristic fractures, slits, or a notch.

DISCUSSION — Secretinite is considered to be derived by the oxidation of plant resin secretions or humic gels. Vesicular and non-vesicular secretinite was formerly included in sclerotinite of fungal origin. Secretinite is a common maceral in medium-and high-rank Permian and Carboniferous coals