In coal geology, liptinite is the finely-ground and macerated remains found in coal deposits. It replaced the term Exinite as one of the four categories of kerogen. Liptinites were originally formed by spores, pollen, dinoflagellate cysts, leaf cuticles, and plant resins and waxes. M.C. Stopes introduced the term exinite in 1935 to describe the mi...
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(from the article `coal`) Three major maceral groups are generally recognized: vitrinite, liptinite (formerly called exinite), and inertinite. The vitrinite group is the most ... ...substances called macerals. Based on their optical reflectance, mode of occurrence, and physical appearance under the microscope, macerals are ... Macera...
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