Pumice - Wikipedia
网页Pumice ( / ˈpʌmɪs /), called pumicite in its powdered or dust form, is a volcanic rock that consists of extremely vesicular rough-textured volcanic glass, which may or may not contain crystals. It is typically light-colored.
Pumice: Igneous Rock - Pictures, Definition & More - Geology.com
网页Pumice is a light-colored, extremely porous igneous rock that forms during explosive volcanic eruptions. It is used as aggregate in lightweight concrete, as landscaping aggregate, and as an abrasive in a variety of industrial and consumer products.
Pumice | Properties, Composition, Formation, Uses - Geology …
网页2023年8月16日 · Pumice is a volcanic rock that consists of highly vesicular rough textural rock glass. It generally light colored. It is created when gas-saturated liquid magma erupts like a carbonated drink and cools so rapidly that the resulting foam solidifies into a glass full of gas bubbles.
What Is Pumice Rock? Geology and Uses - ThoughtCo
网页2019年3月10日 · Pumice is an igneous rock that forms when magma suddenly depressurizes and cools. Essentially, pumice is a solid foam. It is light enough to float on water until it becomes waterlogged. Pumice occurs worldwide wherever explosive volcanic eruptions have occurred. Leading producers include Italy, …
Pumice | Volcanic Glass, Uses, Formation, Properties
网页2024年9月5日 · pumice, a very porous, frothlike volcanic glass that has long been used as an abrasive in cleaning, polishing, and scouring compounds. It is also employed as a lightweight aggregate in precast masonry units, poured …
Pumice: Identification, Pictures, & Info for Rockhounds
网页Pumice is an extrusive igneous rock composed of highly vesicular volcanic glass, formed from violent eruption, depressurization, and rapid cooling of lava. It is usually lightly colored with a felsic or intermediate composition. Pumice can be readily identified by its unique ability to float on water.
Ultimate Guide to Pumice (The Floating Rock!)
网页2024年5月14日 · What is Pumice? Pumice doesn’t have a precise definition, instead, it’s applied to rocks that have the same qualities. Because of this, and the variable composition of magma, it’s hard to pin down it’s exact composition. Pumice isn’t considered a mineral, although it may have some minerals within it.
The Rock That Floats on Water: Pumice - Geology
网页2024年2月15日 · Formed during explosive volcanic eruptions, pumice is a type of igneous rock that emerges when frothy magma cools rapidly, trapping gas bubbles within its structure. As the magma solidifies, it forms a lightweight, porous rock with a …
Pumice: A Frothy, Light-Colored Volcanic Rock with Many Uses
网页2023年6月15日 · Pumice is a very low-density, form-like, mostly light-colored glassy volcanic rock with a vesicular texture, not a mineral. This rough, porous rock forms from mostly silicic, high-viscosity, volatile-rich lava during an explosive volcanic eruption.
Pumice - Minerals Education Coalition
网页Pumice is a type of extrusive volcanic rock, produced when lava with a very high content of water and gases is discharged from a volcano. As the gas bubbles escape, the lava becomes frothy. When this lava cools and hardens, the result is a very light rock material filled with tiny bubbles of gas.