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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.
Aug 16, 2023 · Pumice is a light-colored, vesicular glassy rock formed by rapid cooling of gas-saturated magma. It has various applications in industry, agriculture and cosmetics and is found in volcanically active regions around the world.
Jun 4, 2024 · 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.
- The Editors of Encyclopaedia Britannica
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.
Mar 10, 2019 · Pumice is a light-colored volcanic rock. It's extremely porous, with a foamy appearance. Crushing pumice rock into a powder produces a substance called pumicite or simply volcanic ash. Key Takeaways: Pumice Rock. Pumice is an igneous rock that forms when magma suddenly depressurizes and cools. Essentially, pumice is a solid foam.
- Anne Marie Helmenstine, Ph.D.
Feb 15, 2024 · Often referred to as the “floating rock,” pumice possesses a remarkable ability to defy gravity and glide effortlessly across the surface of water. Today, we embark on a voyage to unravel the secrets of pumice and discover the science behind its buoyant properties.
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.
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