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Volcanic glass often appears as pumice.
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∙ 14y ago
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What igneous rock has no visible crystals?
Granite is a coarse grained igneous rock without Pyroxene.
What is the relationship between basalt gabbro and obsidian?
Basalt and obsidian are extrusive igneous rocks. Gabbro is an intrusive igneous rock.
Why is obsidian considered a granitic rock?
Obsidian is an extrusive igneous rock because it is formed from the rapid cooling of magma after eruption ontoEarth's surface. The rapid cooling of lava results in a fine-grained texture, or in this case (with obsidian), a glassy texture, where cooling takes place so rapidly that mineral crystals do not have time to form. Rock that is formed from slow cooling magma beneath the surface is intrusive igneous rock, and exhibits visible mineral crystals.Obsidian is an extrusive igneous rock.
Is obsidian a metamorphic rock?
Obsidian is an igneous rock.So the answer is YES.
What igneous rock has a smooth glass like texture?
Obsidian
Where is Obsidian?
Obsidian is a naturally occurring glass formed as an extrusive igneous rock
What is a naturally occurring igneous rock more correctly called obsidian?
Obsidian is also called volcanic glass, an extrusive, largely non-crystalline, felsic igneous rock. Pumice is also a frothy form of obsidian.
Can you give a good description of obsidian?
This is taken from the Wikipedia article: "Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock." Igneous means that the material obsidian is made of is molten initially. Extrusive means that the material pours or explodes out of volcanoes, as opposed to remaining under the earth's surface. See links for more.
Is obsidian metamorphic igneous or sedimentary?
Obsidian is an igneous rock.
Is obsidian an igneous rock?
Obsidian is an igneous rock.So the answer is YES.
What igneous rock has no visible crystals?
Granite is a coarse grained igneous rock without Pyroxene.
Dark igneous rock formed from lava?
obsidian obsidian
What group does obsidian belong to?
Obsidian is in the Igneous rock group.
What is the obsidian rock type?
Obsidian is an extrusive felsic igneous rock.
What does rock group does obsidian belong to?
Obsidian is in the Igneous rock group.
What family is obsidian in?
Obsidian is part of the Granite family of igneous rocks.
What is the relationship between basalt gabbro and obsidian?
Basalt and obsidian are extrusive igneous rocks. Gabbro is an intrusive igneous rock.
