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 …

Petroleum-bearing fluid inclusions are small encapsulations of oil and gas that offer an
invaluable opportunity to better constrain the evolution of petroleum systems. Insights into …

Joint application of the Mo isotope paleoredox proxy and Re–Os deposition-age
geochronometer to euxinic black shales has potential for tracing the evolution of ocean …

Publisher Summary This chapter explores two records of past primary producers:
morphological fossils and molecular biomarkers. Because these two windows on ancient …

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

The composition of microbial communities and their relationship to ocean redox structure in
the Precambrian are topics of continuing interest in geobiology. Our knowledge of …

Cores recovered during the Agouron Griqualand Drilling Project contain over 2500m of well-
preserved late Archean Transvaal Supergroup sediments, dating from ca. 2.67 to 2.46 Ga …

The biogeochemical cycling of zinc (Zn) is intimately coupled with organic carbon in the
ocean. Based on an extensive new sedimentary Zn isotope record across Earth's history, we …

Well-preserved microfossils occur in abundance through more than 1000 m of lower
Mesoproterozoic siliciclastic rocks composing the Roper Group, Northern Territory, Australia …

A large number of primary oil and gas reservoirs have been discovered in Proterozoic strata
all over the globe. Proterozoic sequences are widely distributed in China, and the discovery …