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 …
Signatures of early microbial life from the Archean (4 to 2.5 Ga) eon
K Lepot - Earth-Science Reviews, 2020 - Elsevier
Abstract The Archean era (4 to 2.5 billion years ago, Ga) yielded rocks that include the
oldest conclusive traces of life as well as many controversial occurrences. Carbonaceous …
oldest conclusive traces of life as well as many controversial occurrences. Carbonaceous …
Organic-walled microfossils in 3.2-billion-year-old shallow-marine siliciclastic deposits
Although the notion of an early origin and diversification of life on Earth during the Archaean
eon has received increasing support in geochemical, sedimentological and …
eon has received increasing support in geochemical, sedimentological and …
Searching for biosignatures in sedimentary rocks from early Earth and Mars
The recognition of past habitable environments on Mars has increased the urgency to
understand biosignature preservation in and characterize analogues of these environments …
understand biosignature preservation in and characterize analogues of these environments …
Cellular remains in a~ 3.42-billion-year-old subseafloor hydrothermal environment
Subsurface habitats on Earth host an extensive extant biosphere and likely provided one of
Earth's earliest microbial habitats. Although the site of life's emergence continues to be …
Earth's earliest microbial habitats. Although the site of life's emergence continues to be …
Astrobiological potential of rocks acquired by the Perseverance rover at a sedimentary fan front in Jezero crater, Mars
The Perseverance rover has collected seven oriented samples of sedimentary rocks, all
likely older than the oldest signs of widespread life on Earth, at the exposed base of the …
likely older than the oldest signs of widespread life on Earth, at the exposed base of the …
Understanding the application of Raman spectroscopy to the detection of traces of life
CP Marshall, HGM Edwards, J Jehlicka - Astrobiology, 2010 - liebertpub.com
Investigating carbonaceous microstructures and material in Earth's oldest sedimentary rocks
is an essential part of tracing the origins of life on our planet; furthermore, it is important for …
is an essential part of tracing the origins of life on our planet; furthermore, it is important for …
The link between biomineralization and fossilization of bacteria: insights from field and experimental studies
Fossil biominerals and fossils of microorganisms in ancient rocks contain important
biogeochemical signals. Decoding this record may reveal crucial information about the …
biogeochemical signals. Decoding this record may reveal crucial information about the …
Organic carbon generation in 3.5-billion-year-old basalt-hosted seafloor hydrothermal vent systems
B Rasmussen, JR Muhling - Science Advances, 2023 - science.org
Carbon is the key element of life, and its origin in ancient sedimentary rocks is central to
questions about the emergence and early evolution of life. The oldest well-preserved carbon …
questions about the emergence and early evolution of life. The oldest well-preserved carbon …
Earliest life on earth: evidence from the Barberton Greenstone Belt, South Africa
M Homann - Earth-Science Reviews, 2019 - Elsevier
Studies investigating the structure and diversity of Earth's record of life older than 3.2 Ga are
restricted to two locations worldwide in which sedimentary rocks have escaped regional …
restricted to two locations worldwide in which sedimentary rocks have escaped regional …