The hydrocarbon compositions of 11 species of blue-green algae are simple and qualitatively similar. Three marine coccoids contain only monoenoic and dienoic C(19) hydrocarbons. Hydrocarbons of the remaining eight species are C(15) to C(18). Hydrocarbons of higher molecular weight (C(20) or more) were not detected. Blue-green algae do not appear to be the source material for the longchain (greater than 20 carbons) hydrocarbons found in ancient sediments.
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Winters et al. (1969) studied this question.
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