It is the great challenge of geomicrobiology to study microorganisms in the context of their
environments, both in Earth's distant past and in the present. Planet Earth and its biosphere …

Lipid molecules are organic compounds, insoluble in water, and based on carbon-carbon
chains that form an integral part of biological cell membranes. As such, lipids are ubiquitous …

The present-day state as well as the history of isotope organic geochemistry is reviewed.
Theoretical aspects of isotope fractionation in a system of complex organic molecules …

Sedimentary Hydrocarbons Page 103 8.03 Sedimentary Hydrocarbons, Biomarkers for
Early Life JJ Brocks Harvard University, Cambridge, MA, USA and RE Summons …

Bitumens extracted from 2.7 to 2.5 billion-year-old (Ga) shales of the Fortescue and
Hamersley Groups in the Pilbara Craton, Western Australia, contain traces of molecular …

We propose that organic compounds found in a Miocene limestone from Marmorito
(Northern Italy) are source markers for organic matter present in ancient methane vent …

Recent work has highlighted the ubiquity of bacteria and archaea and continues to affirm
their significance in diverse biogeochemical processes. The δ13C values and distributions …

Immature organic matter in lacustrine source rocks from the Jianghan Basin, eastern China,
was studied for distributions and stable carbon isotopic compositions (δ13C) of hydrocarbon …

We measured archaeal lipid distributions from globally distributed samples of freshwater,
marine, and hypersaline suspended particulate matter. Cluster analysis of relative lipid …

Abstract The Late Triassic mass extinction event is the most severe global warming–related
crisis to have affected important extant marine groups such as scleractinian corals, and …