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Acritarchs, the organic-walled palynomorphs of algal affinities, exhibit strong fluorescence colors depending upon species type, stage of thermal maturity, and degree of oxidation.
Although acritarchs show similar fluorescence colors in an autochthonous assemblage, there may be minor differences as a result of different types and wall thicknesses. Similarily, the varying degrees of oxidation of individual palynomorphs can give differing colors.
Thick-walled marine algae also fluoresce but can be distinguished from acritarchs by the differences in intensity of the fluorescence colors.
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