Palagonite is an alteration product from the interaction of water with volcanic glass of chemical composition similar to basalt. Palagonite can also result from the interaction between water and basalt melt.

Palagonite is a term used loosely for variable alteration products of volcanic glass, typically a result of the interaction between water and basalt melt, but also applied to powdery yellow-brown weathering products of basaltic glass.

2023年12月17日 · Palagonite is a yellow, yellow-orange, or brownish material formed from the alteration of basaltic or glass with a chemical composition like basalt. However, it may also form from water interacting with hot magma or lava of basalt-like composition.

Palagonite refers to an alteration product of sideromelane, commonly found in old mafic maar ejecta rings and diatreme infill. It forms rapidly at relatively low temperatures and replaces the glass component of the volcanic material.

Palagonite is an alteration product from the interaction of water with volcanic glass of chemical composition similar to basalt. It forms by the low-temperature hydration of the clear basaltic glass (called sideromelane by von Waltershausen in 1853) found in hyaloclastites, tuffs, and pillow lavas, which results particularly from the quenching ...

2014年2月1日 · Palagonite forms rinds of variable thickness on every mafic glass surface exposed for some time to aquatic fluids. It is formed by either incongruent dissolution or by congruent dissolution of glass with contemporaneous precipitation of insoluble material at the glass–fluid interface.

2001年7月2日 · Palagonitization of volcanic glass is a continuous process of glass dissolution, palagonite formation, and palagonite evolution, which can be subdivided into two different reaction stages with changing element mobilities.

Volcaniclastic rocks rich in palagonite are widely known as palagonite tuffs or palagonite breccias. Quaternary volcanic assemblages in Iceland consisting largely of such rocks were once called the “Palagonite Formation”; they are now called “Moberg.”

Palagonite forms rinds of variable thickness on every mafic glass surface exposed for some time to aquatic fluids. It is formed by either in-congruent dissolution or by congruent dissolution of glass with contemporaneous precipitation of insoluble material at the glass–fluid interface.

Palagonite forms rinds of variable thickness on every mafic glass surface exposed for some time to aquatic fluids. It is formed by either incongruent dissolution or by congruent dissolution of glass with contemporaneous precipitation of insoluble material at the glass-fluid interface.