Siliceous hot-spring deposits, or sinters, typically form in active, terrestrial (on land), volcanic
terrains where magmatically heated waters circulating through the shallow crust emerge at …

This report reviews how terrestrial hot spring systems can sustain diverse and abundant
microbial communities and preserve their fossil records. Hot springs are dependable water …

Seabed fluid flow involves the flow of gases and liquids through the seabed. Such fluids
have been found to leak through the seabed into the marine environment in seas and …

Abstract The Mars rover Spirit encountered outcrops and regolith composed of opaline silica
(amorphous SiO2· n H2O) in an ancient volcanic hydrothermal setting in Gusev crater. An …

Silicified deposits, such as sinters, occur in several modern geothermal environments, but
the mechanisms of silicification (and crucially the role of microorganisms in their …

A 1 m thick carbonate crust, layered and commonly domal, caps crinoidal limestones on reef
complexes of the top Permian Changxing Formation in the Huaying Mountains, eastern …

White, vitreous, siliceous sinter dated by 14C at∼ 1900 years BP is located along the crest
of the Opal Mound deposit at Roosevelt Hot Springs, Utah, USA Deposition at vents resulted …

The extent of hyperthermophilic microbial diversity associated with siliceous sinter
(geyserite) was characterized in seven near-boiling silica-depositing springs throughout …

Microbial mats, located along the margins of hot‐spring pools and outflow channels at Lake
Bogoria, Kenya, are commonly silicified forming friable laminated crusts. Columnar …

Ohaaki Pool was the main hot spring in the Broadlands-Ohaaki geothermal area before
recent anthropogenic modification. The alkaline Na-HCO 3-Cl water, which discharged at 95 …