A volcanic rock of extremely vesicular rough-textured volcanic glass, typically light colored, with a porosity of 64 to 85 percent by volume. It floats on water, sometimes for years, until it becomes waterlogged and sinks, and pumice rafts from underwater eruptions can be a hazard for ships. Its dark, denser cousin with larger vesicles is scoria. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
Classification
Classification UseBuilding and Construction 1 UseIndustrial and Abrasive 1 Formation ClassIgneous, extrusive (extremely vesicular rough-textured volcanic glass) 1 Pumice
Filter Results1 entry
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Associated With
Source Ojos del Salado (Wikipedia)
Caused By
A volcanic rock of extremely vesicular volcanic glass.
Source Pumice (Wikipedia)
Classified As
In Discipline
Source Pumice (Wikipedia)
Sources
1. Pumice (Wikipedia)
Wikimedia FoundationLead section and Properties
Pumice has a porosity of 64-85% by volume and it floats on water, possibly for years, until it eventually becomes waterlogged and sinks.
Other uses
It is also used as an abrasive, especially in polishes, pencil erasers, and the production of stone-washed jeans.
Lead section
Pumice is composed of highly microvesicular volcanic glass with very thin, translucent bubble walls of pyroclastic igneous rock.
View the Source Wikidata: Pumice
Wikidata Q180044
Ojos del Salado (Wikipedia)
Associated With: Ojos del Salado, Article text, rock PumiceQuote, Associated With: Ojos del Salado, Article text, rock Pumice
Two edifices, less than 2.5 kilometres (1.6 mi) wide, flank the 1.3-by-0.5-kilometre-wide (0.81 mi × 0.31 mi) summit crater on its eastern and western side. Basalt, gravel, pumice and scoria crop out in its rim, which is lower on the northern side.
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