Extremophiles are organisms capable of adjust, survive or thrive in hostile habitats that were
previously thought to be adverse or lethal for life. Chile gathers a wide range of extreme …

Recent experimental studies indicate that microorganisms play a passive role in
silicification. The organic functional groups that comprise the outer cell surfaces simply serve …

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 …

The immediate task facing exopaleontology is to define a strategy to explore Mars for a fossil
record during the decade‐long exploration program that lies ahead. Consideration of the …

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

The origin and age of opaline silica deposits discovered by the Spirit rover adjacent to the
Home Plate feature in the Columbia Hills of Gusev crater remains debated, in part because …

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

New chemical and original isotopic data on waters from El Tatio geothermal field, northern
Chile Page 1 547 Geochemical Journal, Vol. 39, pp. 547 to 571, 2005 *Corresponding author …

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 …