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 | 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 concrete, insulation and acoustic tile, and plaster. Pumice is pyroclastic igneous.
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 …
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: 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.
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, Turkey, Russia, United States, …
Pumice Definition & Meaning - Merriam-Webster
网页pum· ice ˈpəm-əs. : a very light glass that is formed by the rapid cooling of lava from volcanoes, is full of small holes, and is used especially in powder form for smoothing and polishing.
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.
What is Pumice? - WorldAtlas
网页2017年7月28日 · What is Pumice? Brown pumice stone sourced from volcanic rock. 5. Description. The word pumice was one derived from the Latin word pumex, meaning "foam". Pumice is a pyroclastic (meaning it is formed from volcanic matter), igneous rock.
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 distinctive spongy texture.