Rethinking the ancient sulfur cycle
The sulfur biogeochemical cycle integrates the metabolic activity of multiple microbial
pathways (eg, sulfate reduction, disproportionation, and sulfide oxidation) along with abiotic …
pathways (eg, sulfate reduction, disproportionation, and sulfide oxidation) along with abiotic …
The terrestrial biota prior to the origin of land plants (embryophytes): a review of the evidence
CH Wellman, PK Strother - Palaeontology, 2015 - Wiley Online Library
It is often assumed that life originated and diversified in the oceans prior to colonizing the
land. However, environmental constraints in chemical evolution models point towards critical …
land. However, environmental constraints in chemical evolution models point towards critical …
Estimating the timing of early eukaryotic diversification with multigene molecular clocks
Although macroscopic plants, animals, and fungi are the most familiar eukaryotes, the bulk
of eukaryotic diversity is microbial. Elucidating the timing of diversification among the more …
of eukaryotic diversity is microbial. Elucidating the timing of diversification among the more …
The geologic time scale
Construction and assembly of the Geologic Time Scale involves:(a) constructing a relative
(chronostratigraphic) standard scale for key periods in the Earth's rock record;(b) identifying …
(chronostratigraphic) standard scale for key periods in the Earth's rock record;(b) identifying …
Large sulfur isotope fractionation does not require disproportionation
The composition of sulfur isotopes in sedimentary sulfides and sulfates traces the sulfur
cycle throughout Earth's history. In particular, depletions of sulfur-34 (34S) in sulfide relative …
cycle throughout Earth's history. In particular, depletions of sulfur-34 (34S) in sulfide relative …
Oxygenation of the mid-Proterozoic atmosphere: clues from chromium isotopes in carbonates
Chromium (Cr) isotopes in marine sedimentary rocks can be used as a sensitive proxy for
ancient atmospheric oxygen because Cr-isotope fractionation during terrestrial weathering …
ancient atmospheric oxygen because Cr-isotope fractionation during terrestrial weathering …
Deconvolving microbial and environmental controls on marine sedimentary pyrite sulfur isotope ratios
Reconstructions of past environmental conditions and biological activity are often based on
bulk stable isotope proxies, which are inherently open to multiple interpretations. This is …
bulk stable isotope proxies, which are inherently open to multiple interpretations. This is …
Pyrite sulfur isotopes reveal glacial− interglacial environmental changes
The sulfur biogeochemical cycle plays a key role in regulating Earth's surface redox through
diverse abiotic and biological reactions that have distinctive stable isotopic fractionations. As …
diverse abiotic and biological reactions that have distinctive stable isotopic fractionations. As …
Earth's earliest non-marine eukaryotes
The existence of a terrestrial Precambrian (more than 542 Myr ago) biota has been largely
inferred from indirect chemical and geological evidence associated with palaeosols,, the …
inferred from indirect chemical and geological evidence associated with palaeosols,, the …
Organosulfur compounds: molecular and isotopic evolution from biota to oil and gas
A Amrani - Annual Review of Earth and Planetary Sciences, 2014 - annualreviews.org
Organosulfur compounds (OSCs) play important roles in the formation, preservation, and
thermal degradation of sedimentary organic matter and the associated petroleum …
thermal degradation of sedimentary organic matter and the associated petroleum …