Challenges in evidencing the earliest traces of life
EJ Javaux - Nature, 2019 - nature.com
Earth has been habitable for 4.3 billion years, and the earliest rock record indicates the
presence of a microbial biosphere by at least 3.4 billion years ago—and disputably earlier …
presence of a microbial biosphere by at least 3.4 billion years ago—and disputably earlier …
[图书][B] Using geochemical data: to understand geological processes
HR Rollinson, H Rollinson, V Pease - 2021 - books.google.com
This textbook is a complete rewrite, and expansion of Hugh Rollinson's highly successful
1993 book Using Geochemical Data: Evaluation, Presentation, Interpretation. Rollinson and …
1993 book Using Geochemical Data: Evaluation, Presentation, Interpretation. Rollinson and …
Nitrogen cycling during the Mesoproterozoic as informed by the 1400 million year old Xiamaling Formation
X Wang, S Zhang, Y Ye, S Ma, J Su, H Wang… - Earth-Science …, 2023 - Elsevier
Nitrogen is an essential nutrient for all life on Earth. It is, and likely has been, a critical
limiting nutrient controlling primary production rates in the oceans. The marine N budget is …
limiting nutrient controlling primary production rates in the oceans. The marine N budget is …
[HTML][HTML] Mid-latitudinal habitable environment for marine eukaryotes during the waning stage of the Marinoan snowball glaciation
H Song, Z An, Q Ye, EE Stüeken, J Li, J Hu… - Nature …, 2023 - nature.com
Abstract During the Marinoan Ice Age (ca. 654–635 Ma), one of the 'Snowball Earth'events
in the Cryogenian Period, continental icesheets reached the tropical oceans. Oceanic …
in the Cryogenian Period, continental icesheets reached the tropical oceans. Oceanic …
Microbial life and biogeochemical cycling on land 3,220 million years ago
The colonization of emergent continental landmass by microbial life was an evolutionary
step of paramount importance in Earth history. Here we report direct fossil evidence for life …
step of paramount importance in Earth history. Here we report direct fossil evidence for life …
Recovery from persistent nutrient-N limitation following the Permian–Triassic mass extinction
Global warming, widespread oceanic anoxia and stagnation, and large perturbations of the
global carbon cycle characterized the end-Permian to Middle Triassic interval. Nitrogen …
global carbon cycle characterized the end-Permian to Middle Triassic interval. Nitrogen …
Nitrogen isotope constraints on the early Ediacaran ocean redox structure
Nitrogen (N) is a macronutrient essential to all living organisms and its availability in
Precambrian oceans may have played an important role in the early evolution and …
Precambrian oceans may have played an important role in the early evolution and …
[HTML][HTML] Moderate levels of oxygenation during the late stage of Earth's Great Oxidation Event
The later stages of Earth's transition to a permanently oxygenated atmosphere during the
Great Oxidation Event (GOE;∼ 2.43–2.06 Ga) is commonly linked with the suggestion of an …
Great Oxidation Event (GOE;∼ 2.43–2.06 Ga) is commonly linked with the suggestion of an …
Pervasive aerobic nitrogen cycling in the surface ocean across the Paleoproterozoic Era
Nitrogen isotope ratios in marine sedimentary rocks have become a widely used
biogeochemical proxy that records information about nutrient cycling and redox conditions in …
biogeochemical proxy that records information about nutrient cycling and redox conditions in …
Nitrogen isotope ratios trace high-pH conditions in a terrestrial Mars analog site
High-pH alkaline lakes are among the most productive ecosystems on Earth and prime
targets in the search for life on Mars; however, a robust proxy for such settings does not yet …
targets in the search for life on Mars; however, a robust proxy for such settings does not yet …