Types of maceral (microscopically identifiable kerogen)
1. inertite group consists of carbonized remains formed by rapid oxidation under aerobic conditions (peat-producing environments). Low H/C and O/C ratios
2. Vitrinite is preserved woody tissue derived from solidified humic gels.
3. Exinite includes lipid-rich materials derived from leaf, spores, pollen, algae, plant waxes, resins, fats, and oils.
4. Liptinites are derived primarily from algal remains and usually have higher H/C ratios than exinites.
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