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It is established that green algae and land plants progressively colonized freshwater and terrestrial habitats throughout the Paleozoic Era, but little is known about the ecology of Paleozoic saline lakes. Here, we report lipid biomarker and petrographic evidence for the occurrence of a green alga as a major primary producer in a late Paleozoic alkaline lake (Fengcheng Formation; 309–292 Ma). A persistently...
Some of the oldest, indisputably indigenous, and thermally exceptionally well preserved biomarkers occur in the uppermost sections of the 1.64billion year old (Ga) Barney Creek Formation (BCF) of the McArthur Basin in northern Australia. These rocks preserve more than 22 different C 40 carotenoid derivatives, including the saturated hydrocarbons β-carotane, γ-carotane and lycopane. However,...
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