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Its striking colours and water-holding properties can make it attractive for landscaping and drainage works. [8] Scoria can be used for high-temperature insulation, as in gas barbecue grills. [9] The ancient Romans used cinders as construction aggregates, one of the earliest industrial uses of volcanic rocks. [7]
Fire rock is manufactured lava rock that is sold in various shapes and sizes, and is used as a medium for retaining direct heat. Fire rocks are used in natural gas fireplaces or in natural gas or propane burning fire pits. It may be used as the main fuel distributor or as padding for fire glass to go on top.
The terms lava stone and lava rock are more used by marketers than geologists, who would likely say "volcanic rock" (because lava is a molten liquid and rock is solid). "Lava stone" may describe anything from a friable silicic pumice to solid mafic flow basalt, and is sometimes used to describe rocks that were never lava, but look as if they ...
The East Rock trap rock ridge overlooking New Haven, Connecticut, U.S. Trap rock forming a characteristic pavement, Giant's Causeway, Northern Ireland Trap rock cliff overlooking the Hudson River from an overlook on the Hudson Palisades in Bergen County, New Jersey, U.S. Trap rock forming a characteristic stockade wall, Giant's Causeway, Northern Ireland
Magma consists of liquid rock that usually contains suspended solid crystals. [14] As magma approaches the surface and the overburden pressure drops, dissolved gases bubble out of the liquid, so that magma near the surface consists of materials in solid, liquid, and gas phases.
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