Iron formations (IF) represent an iron-rich rock type that typifies many Archaean and
Proterozoic supracrustal successions and are chemical archives of Precambrian seawater …

Biosilicification has driven variation in the global Si cycle over geologic time. The evolution
of different eukaryotic lineages that convert dissolved Si (DSi) into mineralized structures …

Fungi have recently been found to comprise a significant part of the deep biosphere in
oceanic sediments and crustal rocks. Fossils occupying fractures and pores in Phanerozoic …

Competition shapes evolution. Toxic metals and metalloids have exerted selective pressure
on life since the rise of the first organisms on the Earth, which has led to the evolution and …

Recognizing fossil microorganisms is essential to the study of life's origin and evolution and
to the ongoing search for life on Mars. Purported fossil microbes in ancient rocks include …

Iron oxide compounds have naturally formed during the whole of Earth's history. Synthetic
compositions with iron oxides are produced with the use of various techniques and widely …

Photoferrotrophy, the process by which inorganic carbon is fixed into organic matter using
light as an energy source and reduced iron [Fe (II)] as an electron donor, has been proposed …

Boiling is a crucial process triggering ore formation in magmatic-hydrothermal systems and
controlling the enrichment of precious and rare metal (loid) s in epithermal-porphyry …

The microbial origin of Precambrian iron formations is debated due to the lack of direct fossil
evidence. In order to reveal the genesis of ironstones under low-oxygen levels, integrative …

This study investigates the authigenically formed Late Cretaceous and Paleogene marine
ironstones in Western Siberia (Russia) based on petrographic and spectroscopic …