Organic carbon productivity and formation of hydrocarbon source rocks during the Early
Precambrian was almost exclusively the product of the growth of microbial mats. Indirect …

The Neoproterozoic provides an important record of glacial–postglacial paleoenvironments,
organic carbon cycling, and hydrocarbon accumulation. Here, to better understand the …

The transition from dominant bacterial to eukaryotic marine primary productivity was one of
the most profound ecological revolutions in the Earth's history, reorganizing the distribution …

ABSTRACT The global Precambrian–Cambrian system includes an important series of
hydrocarbon-bearing strata. However, because rocks of this age are typically deeply buried …

Sterane biomarkers preserved in ancient sedimentary rocks hold promise for tracking the
diversification and ecological expansion of eukaryotes. The earliest proposed animal …

The earliest fossils of animal-like organisms occur in Ediacaran rocks that are approximately
571 million years old. Yet 24-isopropylcholestanes and other C30 fossil sterol molecules …

Lipid biomarker assemblages preserved within the bitumen and kerogen phases of
sedimentary rocks from the ca. 780–729 Ma Chuar and Visingsö Groups facilitate …

Stromatolites are abundant in shallow marine sediments deposited before the evolution of
animals, but in the modern ocean they are restricted to locations where the activity of …

The consensus view is that the O2 concentration of the Archean atmosphere was very low
and that it rose to its present level of 21% in a series of steps, two of which dwarf the others …

Abstract The Neoproterozoic Eon is relatively poorly known from a petroleum perspective,
despite the existence of producing, proven and potential plays in many parts of the world. In …